tag:blogger.com,1999:blog-66900467119309034872024-03-14T01:35:38.185-07:00EBOOKSUnknownnoreply@blogger.comBlogger206125tag:blogger.com,1999:blog-6690046711930903487.post-3156979609364084802015-10-12T00:49:00.000-07:002015-10-15T05:32:38.039-07:00PHƯƠNG TRÌNH VÀ BẤT PHƯƠNG TRÌNH VÔ TỈ - HAY VÀ ĐỘC ĐÁO<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh9N7nUf71jCuRKnkiYPgno0A1nEi8QNOHAN-hGeVZ_ciGymhN6LlX83Vyvxmi7871E3vfd4S5HGSourxQXeTC1FsGnxgGsYt94Q2vREaI2ELI8zJw9PuhAiLp2W9KsIqgUaN8htl0X4lA/s1600/a3.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="480" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh9N7nUf71jCuRKnkiYPgno0A1nEi8QNOHAN-hGeVZ_ciGymhN6LlX83Vyvxmi7871E3vfd4S5HGSourxQXeTC1FsGnxgGsYt94Q2vREaI2ELI8zJw9PuhAiLp2W9KsIqgUaN8htl0X4lA/s640/a3.jpg" width="640" /></a></div>TẢI VỀ TẠI ĐÂY<br /><a href="https://drive.google.com/file/d/0BxntbJmFAOB6aS1JendBa0hIRTQ/view?usp=sharing" target="_blank">DOWNLOAD</a>Unknownnoreply@blogger.comtag:blogger.com,1999:blog-6690046711930903487.post-2404329673719239852015-10-05T00:47:00.000-07:002015-10-15T05:32:38.063-07:00MỘT SỐ PHƯƠNG PHÁP ĐỘC ĐÁO CHỨNG MINH BẤT ĐẲNG THỨC - KHÁ HAY<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhxGkArTvvb5LXx5tlrm3cX8KePTyRsb8g694Uk5A2Amec11DYDtxzT0LuOM3sMpr71IBVykNU7ggV3aTsnxD6GM4DvSuvu05oJMtb5_dqfREPNDS3utL_nrujRSaQ_FFyprkIwasc476M/s1600/a2.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="328" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhxGkArTvvb5LXx5tlrm3cX8KePTyRsb8g694Uk5A2Amec11DYDtxzT0LuOM3sMpr71IBVykNU7ggV3aTsnxD6GM4DvSuvu05oJMtb5_dqfREPNDS3utL_nrujRSaQ_FFyprkIwasc476M/s640/a2.jpg" width="640" /></a></div>TẢI TÀI LIỆU TẠI ĐÂY<br /><a href="https://drive.google.com/file/d/0BxntbJmFAOB6emx6YS1DTFU3NHM/view?usp=sharing" target="_blank">DOWNLOAD</a>Unknownnoreply@blogger.comtag:blogger.com,1999:blog-6690046711930903487.post-78413639298825484662015-09-28T00:43:00.000-07:002015-10-15T05:32:38.079-07:00HAI MƯƠI BÀI TOÁN TÌM MIN - MAX HAY VÀ KHÓ<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhSXt1LTUFrMl-q0odWGMOyfmjNh32wan9Qm0eGodjYraiMUIYvAf2Lw4BwdxZLtYjmyD4TMftlRtCeNb9Ou7gOQ-IXaaeO_txIyBqNzUmx523c3eUWGH4XRtaj8RmMOUixK4nJaSlXe8Y/s1600/a1.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="385" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhSXt1LTUFrMl-q0odWGMOyfmjNh32wan9Qm0eGodjYraiMUIYvAf2Lw4BwdxZLtYjmyD4TMftlRtCeNb9Ou7gOQ-IXaaeO_txIyBqNzUmx523c3eUWGH4XRtaj8RmMOUixK4nJaSlXe8Y/s640/a1.jpg" width="640" /></a></div>ĐÂY LÀ TẬP TÀI LIỆU VỀ 20 BÀI TOÁN TÌM GTLN GTNN, CẦN THIẾT CHO CÁC HỌC SINH KHÁ GIỎI RÈN LUYỆN.<br /><a href="https://drive.google.com/file/d/0BxntbJmFAOB6XzlrUXNfS3ZBdEE/view?usp=sharing" target="_blank">DOWNLOAD</a>Unknownnoreply@blogger.comtag:blogger.com,1999:blog-6690046711930903487.post-75635828620723988012015-09-23T01:31:00.001-07:002015-09-23T01:31:24.912-07:00CHUNG MINH BAT DANG THUC - HAY VA DOC DAO<div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjSgir0RBTLDUMjvIgYKU8C9jvq5Z0ZKWLIYMF0MiI0Isx97CCYo3UBMmm3SKG6DcBMi0wQoI274u-2Tt-qeT6bUZsFSyY5fwoH32H5RQzs8iwypsdJ__Tyry1ltl1gp55P3HLuNFVwE8wi/s1600/phuong+phap+dieu+chinh+so+mu.PNG" imageanchor="1" style="border: 0px; color: #444444; font-weight: bold; margin: 0px 1em; outline: none; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;"><img border="0" height="328" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjSgir0RBTLDUMjvIgYKU8C9jvq5Z0ZKWLIYMF0MiI0Isx97CCYo3UBMmm3SKG6DcBMi0wQoI274u-2Tt-qeT6bUZsFSyY5fwoH32H5RQzs8iwypsdJ__Tyry1ltl1gp55P3HLuNFVwE8wi/s640/phuong+phap+dieu+chinh+so+mu.PNG" style="background: transparent; border: none; margin: 0px; max-width: 99%; padding: 0px;" width="640" /></a></div>
<span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;">CHUNG MINH BAT DANG THUC BANG CACH DIEU CHINH SO MU</span><br />
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Unknownnoreply@blogger.comtag:blogger.com,1999:blog-6690046711930903487.post-91799795036113328912015-09-23T00:12:00.000-07:002015-10-15T05:32:38.114-07:00Chứng minh bất đẳng thức bằng cách điều chỉnh số mũ<div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjSgir0RBTLDUMjvIgYKU8C9jvq5Z0ZKWLIYMF0MiI0Isx97CCYo3UBMmm3SKG6DcBMi0wQoI274u-2Tt-qeT6bUZsFSyY5fwoH32H5RQzs8iwypsdJ__Tyry1ltl1gp55P3HLuNFVwE8wi/s1600/phuong+phap+dieu+chinh+so+mu.PNG" imageanchor="1" style="border: 0px; color: #444444; font-weight: bold; margin: 0px 1em; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;"><img border="0" height="328" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjSgir0RBTLDUMjvIgYKU8C9jvq5Z0ZKWLIYMF0MiI0Isx97CCYo3UBMmm3SKG6DcBMi0wQoI274u-2Tt-qeT6bUZsFSyY5fwoH32H5RQzs8iwypsdJ__Tyry1ltl1gp55P3HLuNFVwE8wi/s640/phuong+phap+dieu+chinh+so+mu.PNG" style="border: none; margin: 0px; padding: 0px;" width="640" /></a></div><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;">Chứng minh bất đẳng thức bằng cách điều chỉnh số mũ của Nguyễn Văn Nho, GV THPT Nguyễn Duy Trinh, Nghệ An. </span><a href="https://drive.google.com/file/d/0B1UntQgSATvxVzJMUmswRjFpREE/view?usp=sharing" style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">Download.</a><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"></span><br /><div><br /></div>Unknownnoreply@blogger.comtag:blogger.com,1999:blog-6690046711930903487.post-64046735913905876212015-09-08T21:04:00.000-07:002015-10-15T05:32:38.129-07:00Phân dạng đề thi đại học môn toán từ 2002 đến 2015<div style="background-color: white; border: 0px; color: #666666; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin-bottom: 5px; padding: 5px 0px;">Phân dạng đề thi đại học môn toán từ 2002 đến 2015 soạn bởi Hoàng Ngọc Thế. <a href="https://drive.google.com/file/d/0B1UntQgSATvxOTdQaG1qOUUxVzg/view?usp=sharing" style="border: 0px; color: #444444; font-weight: bold; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">Download.</a></div><div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiIvczB2wwSofv7_as6CykLAYGwd4Uxh91xQ4osnXHLyiFZUNTiqF3zJwLP4Xk6EaGLjel02jSVUo_ZgR9bV7722FCSfBiYBHtwDkK0iB3dmjtcDkkAYJvzW4WGOluq4-upFDM9xKuQBvxw/s1600/phan+dang+de+thi+dai+hoc+mon+toan+2015.PNG" imageanchor="1" style="border: 0px; color: #00e6ff; font-weight: bold; margin: 0px 1em; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;"><img alt="Phân dạng đề thi đại học môn toán từ 2002 đến 2015" border="0" height="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiIvczB2wwSofv7_as6CykLAYGwd4Uxh91xQ4osnXHLyiFZUNTiqF3zJwLP4Xk6EaGLjel02jSVUo_ZgR9bV7722FCSfBiYBHtwDkK0iB3dmjtcDkkAYJvzW4WGOluq4-upFDM9xKuQBvxw/s640/phan+dang+de+thi+dai+hoc+mon+toan+2015.PNG" style="border: none; margin: 0px; padding: 0px;" title="Phân dạng đề thi đại học môn toán từ 2002 đến 2015" width="550" /></a></div><div><br /></div>Unknownnoreply@blogger.comtag:blogger.com,1999:blog-6690046711930903487.post-50859889427795954562015-09-07T20:01:00.000-07:002015-10-15T05:32:38.164-07:00Bất đẳng thức trong các đề thi học sinh giỏi tại Việt Nam năm 2014<div style="background-color: white; border: 0px; color: #666666; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin-bottom: 5px; padding: 5px 0px;">Bất đẳng thức trong các đề thi học sinh giỏi tại Việt Nam năm 2014. <a href="http://book.vnmath.com/2015/01/inequalities-from-2014-mathematical.html" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; border: 0px; color: #444444; font-weight: bold; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">Download Đề thi và lời giải.</a><br style="margin: 0px; padding: 0px;" /></div><table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="background-color: white; border-collapse: collapse; border-spacing: 0px; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin-left: auto; margin-right: auto; margin-top: 10px; padding: 4px; text-align: center;"><tbody style="border: 0px; margin: 0px; padding: 0px;"><tr style="border: 0px; margin: 0px; padding: 0px;"><td style="border: 0px; margin: 0px; padding: 0px; vertical-align: top;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjlt5yLzb5eEZf-lZ3qb9Rlz6GAzbZSpqic5m001slcglKTbG4SI2N-3CcPF0wE5pUw1x_rBitC74RYO5oVqzYW6uy3btPjS8r_YQNDJo09Qs8QEA2VuYfXwxTujQNwtRgeCiaPo0n0Iw9v/s1600/bat+dang+thuc+tu+cac+cuoc+thi+tai+vietnam+2014.PNG" imageanchor="1" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; border: 0px; color: #00e6ff; font-weight: bold; margin: 0px auto; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;"><img alt="Inequalities from 2014 Mathematical Competitions in Vietnam " border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjlt5yLzb5eEZf-lZ3qb9Rlz6GAzbZSpqic5m001slcglKTbG4SI2N-3CcPF0wE5pUw1x_rBitC74RYO5oVqzYW6uy3btPjS8r_YQNDJo09Qs8QEA2VuYfXwxTujQNwtRgeCiaPo0n0Iw9v/s640/bat+dang+thuc+tu+cac+cuoc+thi+tai+vietnam+2014.PNG" style="border: none; margin: 0px; padding: 0px;" title="bat dang thuc 2014, bat dang thuc 2015, hoc sinh gioi" /></a></td></tr><tr style="border: 0px; margin: 0px; padding: 0px;"><td class="tr-caption" style="border: 0px; font-size: 9.60000038146973px; margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; padding: 0px;" /></td></tr></tbody></table><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;">Soạn bởi Tăng Hải Tuân.</span>Unknownnoreply@blogger.comtag:blogger.com,1999:blog-6690046711930903487.post-13023301387708722362015-08-24T19:49:00.000-07:002015-10-15T05:32:38.181-07:00Tuyển tập Đề thi chọn đội tuyển học sinh giỏi Toán lớp 12 năm 2013 - Phần 2Tiếp theo <a href="" target="_blank">Phần 1.</a><br />Vì số lượng đề thi nhiều và để tăng tốc độ tải trang nên chúng tôi tách thành hai phần.<br /><b>23. Đề thi học sinh giởi thành phố Hồ Chí Minh 2013 - 2014</b><br /><u><b>Ngày 1.</b></u><br /><b>Bài 1:</b> Giải hệ phương trình $$\begin{cases} x^2+y^2+xy+1=4y \\ y(x+y)^2=2x^2+7y+2\end{cases}$$<br /><b>Bài 2: </b> Cho dãy $(x_n)$ thỏa $$\begin{cases} x_1 = a>1 \\ 2014x_{n+1}=x_n^2+2013x_n\end{cases}$$<br />Tìm $$\lim \left ( \frac{x_1}{x_2-1}+\frac{x_2}{x_3-1}+...+\frac{x_n}{x_{n+1}-1}\right)$$<br /><b>Bài 3:</b> Tìm số thực $p,q$ sao cho phương trình $x^2+px+1=0$ và $x^2+qx+2=0$ có nghiệm chunng và $A=2|p|+3|q|$ nhỏ nhất.<br /><b>Bài 4: </b>Cho tam giác ABC cân nội tiếp (O), M di động trên (O). M không thuộc AO. Đường thẳng vuông góc AM tại M cắt BC tại N. Đường trung trực của MN cắt AB, AC lần lượt tại E,F. Tìm quỹ tích trọng tâm tam giác AEF.<br /><b>Bài 5:</b> Tìm $f:\mathbb{R} \to \mathbb{R}$ thỏa $$f(2013f(x+y)) = f(x+y) +2013f(x)f(y) - \frac{xy}{2013}$$<br /><u><b>Ngày 2</b></u><br /><b>Bài 1:</b> Tìm các đa thức $f(x), g(x)$ hệ số nguyên thỏa $$f(g(x)) = x^{2013}+2014x+1 \ \forall x \in \mathbb{R}$$<br /><b>Bài 2:</b> Cho $a_1,a_2,a_3,a_4,a_5$ là các số thực thỏa $a_1+a_2+a_3+a_4+a_5=0$ và $\max_{1 \le i \le j \le 5} |a_i -a_j| \le 1$. Chứng minh $$a_1^2+a_2^2+a_3^2+a_4^2+a_5^2 \le 10$$<br /><b>Bài 3:</b> Một tam giác nguyên là tam giác có độ dài các cạnh là số nguyên. Tìm các tam giác nguyên có chu vi bằng diện tích.<br /><b>Bài 4:</b> Cho tam giác ABC không cân có M,N,P lần lượt là trung điểm BC, CA, AB. Đường trung trực của AB và AC cắt AM lần lượt tại D và E. BD cắt CE tại F. Chứng minh APFN nội tiếp.<br /><b>Bài 5:</b> Có tồn tại hay không một tập con $A$ gồm 2014 phần tử của tập $S = \{1;2;...;3020\}$ thỏa $2x \notin A \ \forall x \in A$?<br /><br /><b>24. Đề thi học sinh giỏi tỉnh Thái Bình năm học 2013 - 2014</b><br /><u><b>Ngày 1</b></u><br /><b>Câu 1</b><br />Giải phương trình trên tập số thực :<br />$2013^{x^3-y^3-3x^2-3y^2-9x+9y+22}+2013^{x^2+y^2-x+y-\frac{1}{2}}=x^3-y^3-2x^2-2y^2-10x+10y+\frac{47}{2}$<br /><b>Câu 2:</b><br />Cho dãy số nguyên $(a_n)$ xác định như sau : <br />$\left\{\begin{matrix} a_0=1,a_1=3,a_2=5\\ a_{n+3}=2a_{n+2}+2a_{n+1}-a_n \end{matrix}\right.$<br />Tìm số nguyên $k$ sao cho $4a_na_{n+1}+k$ là số chính phương với mọi $n$ nguyên dương<br /><b>Câu 3</b><br />Cho tam giác $ABC$ đều, $M,P$ lần lượt thuộc $AB$ và $BC$ sao cho $MP$ song song $AC$. Gọi $D$ là trọng tâm $MPB$ và $E$ là trung điểm $AP$. Tính số đo các góc $\Delta DEC$<br /><b>Câu 4</b><br />Cho thất giác lồi $ABCDEFG$ có các cạnh và các đường chéo $AC,AD,AE,AF$ có độ dài không vượt quá $\sqrt{3}$ bên trong thất giác lồi lấy 2014 điểm phân biệt trong đó không có 3 điểm nào thẳng hàng.<br />1, Chứng minh rằng tồn tại 1 hình tròn đơn vị có tâm nằm trên cạnh của thất giác và chứa ít nhất 288 điểm đã cho<br />2, Xét tất cả các tam giác tạo thành bởi 3 trong 2014 điểm trên, chứng minh số tam giác đó chứa ít nhất là 30% tam giác không nhọn. <br /><u><b>Ngày 2</b></u><br /><b>Câu 5</b><br />Tìm tất cả các đa thức $P(x)$ với hệ số thực thoả mãn điều kiện :<br />$$(P(x))^2-2=2P(2x^2-1)$$<br /><b>Câu 6</b><br />Cho tam giác ABC. Đường tròn nội tiếp tam giác ABC tâm I và tiếp xúc với BC, CA, AB lần lượt tại A', B', C'. Gọi (C) là đường tròn tâm I nằm trong tam giác ABC. D, E, F lần lượt là các giao điểm của (C) với IA', IB', IC'.<br />Chứng minh rằng AD, BE, CF đồng quy<br /><b>Câu 7</b><br />Cho $p$ là số nguyên tố lẻ. Tìm tất cả hàm số $f: \mathbb{Z}\to\mathbb{Z}$ sao cho với mọi $m,n\in \mathbb{Z}$ ta có :<br />1, Nếu $m\equiv n\pmod{p}$ thì $f(m)=f(n)$<br />2, $f(mn)=f(m)f(n)$<br /><b>Câu 8</b><br />Chứng minh rằng trong 18 người bất kì luôn tồn tại 4 người đôi 1 quen nhau hoặc đôi 1 không quen nhau.<br /><br /><b>25. Đề thi học sinh giỏi tỉnh Thái Nguyên năm học 2013 - 2014</b><br /><b>Câu 1.</b> Cho hàm số $y = \dfrac{2x - 1}{{x - 1}}$, $(C)$. Gọi $I$ là giao điểm hai đường tiệm cận của $(C)$. Với giá trị nào của $m$, đường thẳng $y = - x + m$ cắt $(C)$ tại hai điểm phân biệt $A, B$ và tam giác $IAB$ đều.<br /><b>Câu 2.</b><br /><br /><ol class="lower-alpha"><li> Giải phương trình sau trên tập số thực $$5\cos \left( {2x + \frac{\pi }{3}} \right) = 4\sin \left( {\frac{{5\pi }}{6} - x} \right) - 9.$$</li><li> Giải hệ phương trình sau trên tập số thực $$\left\{ \begin{array}{l}<br />\sqrt {7x + y} - \sqrt {2x + y} = 4\\<br />2\sqrt {2x + y} - \sqrt {5x + 8} = 2<br />\end{array} \right.$$</li></ol><b>Câu 3.</b> Cho tam giác $ABC$ không đều thỏa mãn ${a^2} = 4S.\cot A$, trong đó $BC = a$ và $S$ là diện tích tam giác $ABC$. Gọi $O$ và $G$ theo thứ tự là tâm đường tròn ngoại tiếp và trọng tâm tam giác $ABC$. Tính góc giữa hai đường thẳng $AG$ và $OG$.<br /><b>Câu 4.</b> Cho dãy số $\left\{ {{x_n}} \right\}$ xác định như sau: ${x_1} = \sqrt 3$ và<br />$${x_{n + 1}} = \sqrt {9x_n^2 + 11{x_n} + 3}, \left( n \in \mathbb{N}^* \right)$$<br />Tìm $\mathop {\lim }\limits_{n \to + \infty } \dfrac{{{x_{n + 1}}}}{{{x_n}}}$.<br /><b>Câu 5.</b> Cho $x, y, z$ là các số thực dương thay đổi thỏa mãn $x + y + z = 3$. Tìm giá trị lớn nhất của biểu thức $$P = \frac{{xy}}{{3x + 4y + 2z}} + \frac{{yz}}{{3y + 4z + 2x}} + \frac{{zx}}{{3z + 4y + 2y}}.$$<br /><br /><b>26. Đề thi học sinh giỏi tỉnh Sơn La năm học 2013 - 2014</b><br /><b>Câu 1.</b> <br /><ol class="lower-alpha"><li> Tìm hệ số của số hạng không chứa $x$ trong khai triển nhị thức Niu-tơn $\left( \dfrac{1}{\sqrt[3]{x}} + x\sqrt[3]{x^2} \right)^n$ biết rằng tổng các hệ số của các số hạng trong khai triển này là $a_0 + a_1 +... + a_n = 4096$.</li><li> Cho phương trình $x^3-3x+1=0$. Chứng minh rằng phương trình có 3 nghiệm phân biệt.</li></ol><b>Câu 2.</b><br /><ol class="lower-alpha"><li> Chứng minh rằng nếu $n$ là số nguyên và $n \ge 1$ thì:<br />$$\left(1+\dfrac{1}{n+1} \right)^{n+1} > \left(1+\dfrac{1}{n} \right)^n.$$</li><li> Tìm giới hạn sau:<br />$$L = \lim_{x \to \frac{\pi}{2}}\dfrac{1-\sin^{m+n+p}{x}}{\sqrt[3] {\left(1- \sin^m{x} \right) \left( 1- \sin^n{x} \right) \left( 1- \sin^p{x}\right) }}$$<br />Với $m,n,p \in \mathbb{N}^{*}$.</li></ol><b>Câu 3</b> Cho hàm số : $y= \dfrac{x^4}{2} = 3x^2 + \dfrac{5}{2} (C)$ và điểm $M \in (C)$ có hoành độ $x_M = a$. Với giá trị nào của $a$ thì tiếp tuyến của $(C)$ tại $M$ cắt $(C)$ ở hai điểm phân biệt khác $M$.<br /><b>Câu 4</b> Cho hình chóp $S.ABCD$ có đáy $ABCD$ là hình vuông cạnh $a$, cạnh bên $SA = h$ và $SA \perp (ABCD)$. $M$ là điểm thay đổi trên cạnh $CD$. Đặt $CM = x$.<br /><ol class="lower-alpha"><li> Hạ $SH \perp BM$. Tính $SH$ theo $a, h$ và $x$.</li><li> Xác định vị trí của $M$ để thể tích tứ diện $SABH$ đại giá trị lớn nhất. Tìm GTLN đó.</li></ol><b>Câu 5</b> (4 điểm)<br />Cho tam giác $ABC$ biết $\sin{A}^2 + \sin{B}^2 = k \sin{C}^2$ với $k > \dfrac{1}{2}$. Tìm giá trị lớn nhất của $\sin C$.<br /><br /><b>27. Đề thi chọn đội tuyển Hải Phòng năm 2013-2014.</b><br /><b><u>Ngày 1.</u></b><br /><b>Câu 1.</b> Cho dãy số $(x_n)$ thỏa $x_1=1$ và<br />$$x_{n+1}=20+\frac{13}{x_n},\forall n\geq 1.$$<br />Chứng minh rằng dãy $(x_n)$ hội tụ. Tính $\lim x_n$.<br /><br /><b>Câu 2.</b> Cho đường tròn $(O)$ đường kính $AB$ cố định. Điểm $C$ di chuyển trên đường tròn ($C$ khác $A$ và $B$). Dựng đường cao $CD$ của tam giác $ABC$. Đường tròn $(J)$ tiếp xúc với các đoạn thẳng $AD$ và $CD$, đồng thời tiếp xúc trong với đường tròn $(O)$ tại $E$. Gọi $F$ là giao điểm của đường phân giác góc $\widehat{ACD}$ và $\widehat{AEB}$. Chứng minh rằng $F$ nằm trên một đường thẳng cố định.<br /><b>Câu 3.</b> Cho $x,y,z$ là các số thực dương thỏa $xy+yz+zx=\sqrt{xyz}$. CHứng minh rằng<br />$$\frac{x^{2014}}{1-x}+\frac{y^{2014}}{1-y}+\frac{z^{2014}}{1-z}<\frac{1}{3.4^{2013}}.$$<br /><b>Câu 4.</b> Trong một phòng thi có $n$ ($n\geq 2$) thí sinh được xếp xung quanh một bàn tròn. Trong ngân hàng đề có $4$ loại đề khác nhau, mỗi loại có nhiều hơn $n$ bản. Một cách phát đề được gọi là hợp lệ nếu mỗi thí sinh chỉ nhận một đề và khác loại đề hai thí sinh ngồi cạnh. Hỏi có nhiều nhất bao nhiêu thí sinh biết rằng số cách phát đề hợp lệ không quá $2013$?<br /><b><u>Ngày 2</u></b><br /><b>Câu 1.</b> Cho $a,b$ là hai số tự nhiên thỏa mãn $1\leq a\leq b$, đặt $M=\left[\dfrac{a+b}{2}\right]$. Gọi $f:\mathbb{Z}\to\mathbb{Z}$ là hàm số xác định bởi<br />$$f(n)=\begin{cases}n+a,\quad \text{ nếu } n<M\\ n-b,\quad \text{ nếu } n\geq M\end{cases}.$$<br />Đặt $f^1(n)=f(n), f^{i+1}(n)=f(f^i(n))$. Tìm số $k$ nhỏ nhất thỏa mãn $f^k(0)=0$.<br /><b>Câu 2.</b> Cho hai đường tròn $(O_1)$ và $(O_2)$ cắt nhau tại $A$ và $B$ ($O_1$ và $O_2$ nằm về hai phía so với $AB$). Một đường thẳng thay đổi qua $A$ cắt $(O_1),(O_2)$ lần lượt tại $C,D$ khác $A$ ($A$ nằm giữa $C,D$). Gọi $P,Q$ lần lượt là hình chiếu vuông góc của $B$ xuống tiếp tuyến tại $C$ của $(O_1)$ và tiếp tuyến tại $D$ của $(O_2)$. Chứng minh rằng đường thẳng $PQ$ luôn tiếp xúc với một đường tròn cố định.<br /><b>Câu 3.</b> Cho $p$ là số nguyên tố có dạng $4k+3$, ($k\in\mathbb{Z}$). Hãy tìm số dư của phép chia<br />$$(1^2+1)(2^2+1)(3^2+1)....((p-1)^2+1) \text{ cho } p.$$<br /><b>Câu 4.</b> Trong mỗi ô của bảng $2013\times 2013$ ô vuông, ta điền một số thực bất kỳ trong đoạn $[-1;1]$ sao cho tổng bốn số trong mỗi bảng vuông con $2\times 2$ đều bằng $0$. Hỏi tổng tất cả các số trong bảng $2013\times 2013$ đạt giá trị lớn nhất là bao nhiêu?<br /><br /><b>28. Đề thi chọn đội tuyển tỉnh Bình Định năm học 2013-2014.</b><br /><span style="font-family: inherit;"><strong>Bài 1.</strong> Giải hệ phương trình:$$\left\{\begin{matrix} \frac{2xy+y\sqrt{x^2-y^2}}{14} =\sqrt{\frac{x+y}{2}}+\sqrt{\frac{x-y}{2}}& & \\ \sqrt{\left ( \frac{x+y}{2} \right )^3}+\sqrt{\left ( \frac{x-y}{2} \right )^3}=9& & \end{matrix}\right.$$</span><br /><span style="font-family: inherit;"><strong>Bài 2.</strong> Cho tập $M=\left\{1,2,3,...,2013,2014\right\}$</span><br /><span style="font-family: inherit;">$a.$ Lấy ngẫu nhiên ra hai số trong tập $M$. Tính xác suất để mỗi số trong hai số đó chia hết cho ít nhất một trong các số $2,3,13$</span><br /><span style="font-family: inherit;">$b.$ Có bao nhiêu cách chọn ra hai tập hợp con của $M$ (không kể thứ tự) mà giao của chúng có duy nhất một phần tử ?</span><br /><span style="font-family: inherit;"><strong>Bài 3.</strong> Cho dãy $(U_n)$ xác định bởi:$-1<U_0<1,U_n=\sqrt{\frac{1+U_{n-1}}{2}}$</span><br /><span style="font-family: inherit;">Với $n=1,2,...$</span><br /><span style="font-family: inherit;">Hai dãy $(V_n)$ và $(W_n)$ được xác định như sau:$V_n=4^n(1-U_n)$ và $W_n=U_1U_2...U_n$</span><br /><span style="font-family: inherit;">Tìm $\lim V_n$ và $\lim W_n$</span><br /><strong><span style="font-family: inherit;">Bài 4.</span></strong><br /><span style="font-family: inherit;">$1.$ Cho tam giác $ABC$. Các đường phân giác $BD,CE$ của tam giác cắt nhau tại $I$.</span><br /><span style="font-family: inherit;">Chứng minh rằng: Tam giác $ABC$ vuông khi và chỉ khi $S_{BCDE}=2S_{BIC}$</span><br /><span style="font-family: inherit;">$2.$ Cho hình chóp $SABC$ trong đó $SA,SB,SC$ vuông góc với nhau từng đôi một. Trên các tia $SA,SB,SC$ lần lượt lấy các điểm $A',B',C'$ sao cho: $SA.SA'=SB.SB'=SC.SC'$. Vẽ $SH\perp (A'B'C')$ cắt $(ABC)$ tại $G$</span><br /><span style="font-family: inherit;">$a.$ Chứng minh rằng $G$ là trọng tâm tam giác $ABC$</span><br /><span style="font-family: inherit;">$b.$ Cho $SA=a,SB=b,SC=c$. Gọi $r$ là bán kình mặt cầu nội tiếp hình chóp $SABC$.</span><br /><span style="font-family: inherit;">Chứng minh:$$r=\frac{S_{SAB}+S_{SBC}+S_{SCA}-S_{ABC}}{a+b+c}$$</span><br /><span style="font-family: inherit;"><strong>Bài 5.</strong> Tìm $m$ để hệ sau có nghiệm:$$\left\{\begin{matrix} \log_{x^2+y^2}(x-y)\geq 1 & & \\ x-2y=m & & \end{matrix}\right.$$</span><br /><br /><b>29. Đề thi chọn đội tuyển ĐH Khoa học tự nhiên Hà Nội năm học 2013-2014.</b><br /><i>Ngày thi thứ nhất: </i><br /><br /><b>Bài 1. </b>Cho dãy số $(a_n)$ thỏa mãn: $a_1=3, a_2=17, a_3=99$ và<br /> $a_{n+1}=\frac{a_n^{2}+a_{n-1}^{2}-1}{a_{n-2}}$.<br />Chứng minh rằng $a_{2014}+1$ là số chính phương.<br /><br /><b>Bài 2.</b> Cho tập hợp $S={1,2,3,...,2014}$. Tìm số cách chọn ra từ tập $S$ $m$ số chẵn và $n$ số lẻ sao cho trong các số vừa chọn, không có hai số hơn kém nhau $1$ đơn vị.<br /><br /><b>Bài 3. </b>Cho tam giác $ABC$, tâm ngoại tiếp $O$.Phân giác trong góc $A$ cắt cạnh $BC$ tai điểm $D$. $P$ và $Q$ là $2$ điểm di chuyển trên đoạn $AD$ sao cho thỏa mãn: $\widehat{CBP}=\widehat{ABQ}$. Gọi $R$ là hình chiếu của $Q$ trên cạnh $BC$, $d$ là đường thẳng qua $R$ vuông góc với $OP$. Chứng minh rằng khi $P, Q$ di chuyển trên $AD$ thì các đường thẳng $d$ luôn đi qua một điểm cố định.<br /><br /><b>Bài 4.</b> Có tồn tại hay không một tập hữu hạn các điểm xanh và đỏ trong mặt phẳng sao cho với mọi đường tròn đơn vị có tâm là một điểm xanh đều có đúng $10$ điểm đỏ, và số điểm xanh nhiều hơn số điểm đỏ.<br /><br /><i>Ngày thi thứ hai: </i><br /><br /><b>Bài 1.</b> Tìm các số nguyên $m,n$ thỏa mãn điều kiện $2n^{2}+3|m^{2}-2$<br /><br /><b>Bài 2.</b> Tìm tất cả các hàm số $f: R\rightarrow R$ thỏa mãn điều kiện sau:<br />$f(x+y)+f(x)f(y)=f(x)+f(y)+f(xy)+2xy$ với mọi số thực $x,y$<br /><br /><b>Bài 3.</b> Cho lục giác $ABCDEF$ nội tiếp đường tròn $(O)$. Gọi $M,L,K$ là tâm đường tròn Ơle các tam giác $CDE, EFA, ABC$. Gọi $X,Y,Z$ là hình chiếu của $M,L,K$ trên các đường thẳng $AD,CF,EB$. Chứng minh rằng trung trực các đoạn thẳng $AX,CY,EZ$ đồng quy.<br /><br /><b>Bài 4.</b> Cho các số thực $a,b,c$ thỏa mãn điều kiện $a^{2}+b^{2}+c^{2}\leq 2$.<br />Tìm giá trị lớn nhất của<br /> $A=(|a-b|+\sqrt{6})(|b-c|+\sqrt{6})(|c-a|+\sqrt{6})$.<br /><br /><b>30. Đề thi chọn đội tuyển ĐH Sư phạm Hà Nội năm học 2013-2014.</b><br /><b>Câu 1.</b> Cho dãy số $(x_n)$ thỏa mãn $x_1=1$ và : <br />$$x_{n+1}=\sqrt{x_n^2+2x_n+2}-\sqrt{x_n^2-2x_n+2}\,\,\,\forall n\in\mathbb{N}^{*}$$<br />Chứng minh rằng dãy số $(x_n)$ có giới hạn hữu hạn khi $n\to +\infty$<br /><b>Câu 2.</b> Tìm tất cả nghiệm thực của hệ :<br />$$\left\{\begin{matrix} x+x^2y=y+2\\ (2x+y)^2+3y^2=12 \end{matrix}\right.$$<br /><b>Câu 3.</b> Cho tam giác nhọn ABC và các đường cao AD, BE, CF. Các đường tròn đường kính AB, AC theo thứ tự cắt tia DF, DE tại Q, P. Gọi N là tâm ngoại tiếp tam giác DEF. Chứng minh rằng :<br />a) AN $\perp$ PQ<br />b) AN, BP, CQ đồng quy<br /><b>Câu 4.</b> Cơ sở dữ liệu tạp chí của thư viện Quốc Gia có đúng 2016 loại khác nhau . Thư viện này cho phép 2013 thư viện địa phương kết nối để có thể khai thác cơ sở dữ liệu tạp chí của nó. Biết mỗi thư viện địa phương được phép khai thác ít nhất 1008 loại tạp chí khác nhau và 2 thư viện địa phương bất kì có tối đa 504 loại tạp chí mà cả 2 thư viện địa phương đó cùng đc phép khai thác. Chứng minh rằng không có quá 1 loại tạp chí trong cơ sở dữ liệu của thư viện Quốc Gia mà cả 2013 thư viện địa phương đều không thể khai thác được.<br /><br /><br /><i>Tiếp tục cập nhật...</i><br /><script type="text/x-mathjax-config"> MathJax.Hub.Config({tex2jax: {inlineMath: [['$','$'], ['\\(','\\)']]}}); </script><script src="http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML" type="text/javascript"></script>Unknownnoreply@blogger.comtag:blogger.com,1999:blog-6690046711930903487.post-28562801331156524362015-08-03T19:31:00.000-07:002015-10-15T05:32:38.216-07:00Tuyển tập Đề thi học sinh giỏi Toán năm học 2013 - 2014Bài viết chia thành 2 phần vì quá dài: <a href=""><span style="color: blue;"><b>Xem phần 2 ở đây.</b></span></a><br /><script type="text/x-mathjax-config"> MathJax.Hub.Config({tex2jax: {inlineMath: [['$','$'], ['\\(','\\)']]}}); </script><script src="http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML" type="text/javascript"></script><br /><br /><div dir="ltr" style="text-align: left;" trbidi="on"><span style="font-family: inherit;">VNMATH giới thiệu Tuyển tập Đề thi học sinh giỏi Toán lớp 12 các tỉnh năm học 2013 - 2014.</span><br /><b><span style="font-family: inherit;">1. Đề thi học sinh giỏi thành phố Hà Nội năm học 2013 - 2014</span></b><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiV8q7SXZ9C7melSa3PCkcpVvTMX-zEY5a_tumbQeJSIZKG6MMIyEf90aG9In1Cp37Uqd_sviKB1P9SV_tddhcQc4Bxe57jgfWvjZe18VbIkWiqvVSkZfw5i7ksgF7SRxXINwHTwS8Sfy9F/s1600/hsg-hn-2014.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><span style="font-family: inherit;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiV8q7SXZ9C7melSa3PCkcpVvTMX-zEY5a_tumbQeJSIZKG6MMIyEf90aG9In1Cp37Uqd_sviKB1P9SV_tddhcQc4Bxe57jgfWvjZe18VbIkWiqvVSkZfw5i7ksgF7SRxXINwHTwS8Sfy9F/s640/hsg-hn-2014.jpg" /></span></a></div><span style="font-family: inherit;"><b>2. Đề thi học sinh giỏi tỉnh Bắc Giang năm học 2013 - 2014</b></span><br /><div style="text-align: justify;"><strong style="line-height: 1.3em;"><span style="font-family: inherit; font-size: small;">Câu 1 (4 điểm)</span></strong></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;">Giải hệ phương trình</span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;">$$\left\{\begin{matrix} 3x^{2}-8x+2(x-1)\sqrt{x^{2}-2x+2}=2(y+2)\sqrt{y^{2}+4y+5} & & \\ x^{2}+2y^{2}=4x-8y-6 & & \end{matrix}\right.$$</span></div><div style="text-align: justify;"><strong><span style="font-family: inherit; font-size: small;">Câu 2 (4 điểm)</span></strong></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;">Cho ba số dương $a,b,c$ thỏa mãn $ab+bc+ca=3$.CMR</span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;">$$a\sqrt{\frac{b+c}{a^{2}+bc}}+b\sqrt{\frac{c+a}{b^{2}+ca}}+c\sqrt{\frac{a+b}{c^{2}+ab}}\leq \frac{3}{abc}$$</span></div><div style="text-align: justify;"><strong><span style="font-family: inherit; font-size: small;">Câu 3 (4 điểm)</span></strong></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;">Cho tam giác $ABC$ có $\widehat{ABC}<\widehat{BAC}$. Trên đường thẳng $BC$ lấy điểm $D$ thỏa mãn $\widehat{CAD}=\widehat{ABC}$.Đường tròn $(O)$ bất kì đi qua $B,D$ cắt $AB,AD$ lần lượt tại $M,N$ .Kẻ hai tiếp tuyến $AP,AQ$ với $(O),P,Q$ thuộc $(O)$. Gọi $G$ là giao điểm của $BN$ và $DM$, gọi $I$ là trung điểm của $AG$.</span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;"> a/ CMR: $P,Q,G$ thẳng hàng.</span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;"> b/ CMR: $CI$ vuông góc với $AG$.</span></div><div style="text-align: justify;"><strong><span style="font-family: inherit; font-size: small;">Câu 4 (4 điểm)</span></strong></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;">Cho dãy số $(x_{n})$ thỏa mãn</span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;">$$\left\{\begin{matrix} x_{1}=0,x_{2}=1 & & \\ x_{n+1}=\frac{3x_{n-1}+2}{10x_{n}+2x_{n-1}+2},n\geq 2 & & \end{matrix}\right.$$</span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;">Chứng minh rằng dãy $(x_{n})$ có giới hạn và tìm $lim x_{n}$</span></div><div style="text-align: justify;"><strong><span style="font-family: inherit; font-size: small;">Câu 5 (4 điểm)</span></strong></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;"> Tìm cặp các số nguyên $(a,b)$ sao cho</span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;">$$\frac{b^{2}+ab+a+b-1}{a^{2}+ab+1}$$</span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;">là một số nguyên.</span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;"><br /></span></div><span style="font-family: inherit;"><b>3. Đề thi học sinh giỏi tỉnh Lâm Đồng năm học 2013 - 2014</b></span><br /><strong style="font-family: inherit;">Bài 1:</strong><span style="font-family: inherit;"> Giải hệ phương trình</span><br /><span style="font-family: inherit; font-size: small;">$$\left\{ \begin{matrix} 8{{x}^{3}}+2y=\sqrt{y+5x+2} \\ \left( 3x+\sqrt{1+9{{x}^{2}}} \right)\left( y+\sqrt{1+{{y}^{2}}} \right)=1 \\ \end{matrix} \right.$$ .</span><br /><span style="font-family: inherit; font-size: small;"> </span><br /><span style="font-family: inherit; font-size: small;"><strong>Bài 2</strong>: Cho $a,b,c$ là 3 số thực dương thỏa $abc=1$ . Tìm giá trị nhỏ nhất của biểu thức</span><br /><span style="font-family: inherit; font-size: small;">$$P=\frac{bc}{{{a}^{2}}b+{{a}^{2}}c}+\frac{ca}{{{b}^{2}}c+{{b}^{2}}a}+\frac{ab}{{{c}^{2}}a+{{c}^{2}}b}$$</span><br /><span style="font-family: inherit; font-size: small;"> </span><br /><span style="font-family: inherit; font-size: small;"><strong>Bài 3:</strong></span><br /><span style="font-family: inherit; font-size: small;">1) Cho hai đường tròn $\left( {{O}_{1}} \right)$ và $\left( {{O}_{2}} \right)$ lần lượt có bán kính là ${{R}_{1}},{{R}_{2}}\left( {{R}_{1}}<{{R}_{2}} \right)$ tiếp xúc trong tại $A$. Gọi $M$ là điểm di động trên $\left( {{O}_{1}} \right)$ ($M$ khác $A$), tiếp tuyến của $\left( {{O}_{1}} \right)$ tại $M$ cắt $\left( {{O}_{2}} \right)$ tại $B$ và $C$. Gọi $M'$ ($M'$ khác $A$) là giao điểm của $AM$ với $\left( {{O}_{2}} \right)$.</span><br /><span style="font-family: inherit; font-size: small;">a) Chứng minh $AM’$ là đường phân giác của góc $\widehat{ABC}$ .</span><br /><span style="font-family: inherit; font-size: small;">b) Tìm quỹ tích tâm $I$ của đường tròn nội tiếp tam giác $ABC$.</span><br /><span style="font-family: inherit; font-size: small;"> </span><br /><span style="font-family: inherit; font-size: small;">2) Cho đường tròn $\left( C \right)$ có tâm $I$ và đường kính $AB$, trên đoạn $IB$ lấy điểm $C$ ($C$ khác $I$ và $B$). Đường thẳng $(d)$ vuông góc với $AB$ tại $C$ và $H$ là điểm thay đổi trên $(d)$. Đường thẳng $AH$ cắt đường tròn $\left( C\right)$ tại điểm $D$ và đường tròn $BH$ cắt đường tròn $\left( C\right)$ tại $E$. Chứng minh đường thẳng $DE$ luôn đi qua điểm cố định.</span><br /><span style="font-family: inherit; font-size: small;"> </span><br /><span style="font-family: inherit; font-size: small;"><strong>Bài 4:</strong> Cho dãy số $\left( {{x}_{n}} \right),n=1,2,3,...$ xác định bởi</span><br /><span style="font-family: inherit; font-size: small;">$$\left\{ \begin{matrix} {{x}_{1}}=1 \\ {{x}_{n+1}}=\sqrt{{{x}_{n}}\left( {{x}_{n}}+1 \right)\left( {{x}_{n}}+2 \right)\left( {{x}_{n}}+3 \right)+1}\end{matrix} \right.,n=1,2,3,...$$</span><br /><span style="font-family: inherit; font-size: small;">a) Chứng minh : $\underset{n\to +\infty }{\mathop{\lim }}\,{{x}_{n}}=+\infty $</span><br /><span style="font-family: inherit; font-size: small;">b) Tìm $\underset{n\to +\infty }{\mathop{\lim }}\,\sum\limits_{k=1}^{n}{\frac{1}{{{x}_{k}}+2}}$</span><br /><span style="font-family: inherit; font-size: small;"> </span><br /><span style="font-family: inherit; font-size: small;"><strong>Bài 5: </strong>Tìm tất cả hàm số liên tục $f:\mathbb{R}\to \mathbb{R}$ sao cho</span><br /><span style="font-family: inherit; font-size: small;">$$f\left( x \right)+f\left( {{x}^{4}} \right)=4026+x+{{x}^{4}}$$ </span><br /><span style="font-family: inherit; font-size: small;"><br /></span> <span style="font-family: inherit; font-size: small;"> </span><br /><span style="font-family: inherit;"><b>4. Đề thi học sinh giỏi tỉnh Đồng Tháp năm học 2013 - 2014</b></span><br /><div style="text-align: justify;"><span style="font-size: small;"><strong><span style="font-family: inherit;">Câu 1:</span></strong></span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;">a) Giải phương trình $(2cos x-1)(sinx+cosx)=1$</span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;">b) Cho $a,b,c$ là số thực dương. Chứng minh rằng ta có</span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;">$$\frac{2}{(a+b)^2}+\frac{2}{(b+c)^2}+\frac{2}{(a+c)^2}\geq\frac{1}{a^2+bc}+\frac{1}{b^2+ac}+\frac{1}{c^2+ab}$$</span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;"> </span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;"><strong>Câu 2:</strong></span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;">a) Chứng minh nếu $p$ là số nguyên tố dạng $4k+3$ thì không tồn tại số nguyên dương $n$ sao cho $n^2+1$ chia hết cho $p$</span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;">b) Giải phương trình nghiệm nguyên $(x+y)^2+2=2x+2013y$.</span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;"> </span></div><div style="text-align: justify;"><span style="font-size: small;"><strong><span style="font-family: inherit;">Câu 3:</span></strong></span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;">Cho dãy $a_n$ thoả $a_1=\dfrac{1}{2}$, $a_{n+1}=a_n+ \dfrac{n^2}{2013}$, $n \geq 1$ </span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;">a) Chứng minh dãy tăng nhưng không bị chặn trên </span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;">b) Đặt $S_n=\sum_{i=1}^{n}\dfrac{1}{a_1+2013}.$ Tìm $\lim_{n\to +\propto} S_n$</span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;"> </span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;"><strong>Câu 4:</strong></span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;">Tam giác $ABC$ nhọn có $H$ là trực tâm, $AH,BH,CH$ lần lượt cắt $BC,CA,AB$ tại $M,N,P$. $AE$ và $MF$ cùng vuông gọc với $NP$ (trong đó $E$, $F$ thuộc $NP$) </span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;">a) Chứng minh rằng $H$ là tâm đường tròn nội tiếp tam giác $MNP$ và $A$ là tâm đường tròn bàng tiếp góc $M$ của $MNP$ </span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;">b) Chứng minh $EH$ đi qua trung điểm của $MF$ </span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small; text-decoration: underline;"><strong> </strong></span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;"><strong>Câu 5:</strong></span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;">Cho dãy các phân số: $\dfrac{1}{1},\dfrac{1}{2},...,\dfrac{1}{2012},\dfrac{1}{2013}$. Người ta biến đổi dãy bằng cách xoá đi $2$ số $a,b$ bất kì và thay bằng số $a+b+ab$. Sau một lần biến đổi các số hạng giảm đi $1$ đơn vị so với dãy trước. Chứng minh rằng giá trị của số hạng cuối sau $2012$ lần biến đổi không phụ thuộc vào thứ tự thực hiện và tìm giá trị đó.</span></div><span style="font-family: inherit;"><br /></span> <span style="font-family: inherit;"><b>5. Đề thi học sinh giỏi thành phố Đà Nẵng năm học 2013 - 2014</b></span> <a href="http://forum.vnmath.com/viewtopic.php?f=64&t=35">Xem và thảo luận tại đây/</a><br /><br /><span style="font-family: inherit;"><br /></span> <span style="font-family: inherit;"><b>6. Đề thi học sinh giỏi tỉnh Quảng Bình năm học 2013 - 2014</b></span><br /><b style="font-family: inherit;">Câu 1 (4.0 điểm)</b><br /><span style="font-family: inherit;">Giải phương trình $x=\sqrt{3-x}.\sqrt{4-x}+\sqrt{4-x}.\sqrt{5-x}+\sqrt{5-x}.\sqrt{3-x}$</span><br /><b><span style="font-family: inherit;">Câu 2 (4.0 điểm)</span></b><br /><span style="font-family: inherit;">Cho a là số thực dương tùy ý. Xét dãy số $({{x}_{n}})$ được xác định như sau:</span><br />$${{x}_{1}}=a\,;\,\,{{x}_{n+1}}=\frac{{{x}_{n}}\sqrt{2+\sqrt{2+...+\sqrt{2}}}}{{{x}_{n}}+1},$$ (tử số có n dấu căn); $\forall n=1,2,3...$<br /><span style="font-family: inherit;">Tính giới hạn của dãy số $({{x}_{n}})$.</span><br /><b><span style="font-family: inherit;">Câu 3 (4.0 điểm)</span></b><br /><span style="font-family: inherit;">Tìm các hàm số $f:\mathbb{R}\to \mathbb{R}$ thỏa mãn:</span><br /><span style="font-family: inherit;">$\frac{1}{2}f(xy)+\frac{1}{2}f(xyz)-f(x)f(yz)\ge \frac{1}{4},\forall x,y,z\in \mathbb{R}$.</span><br /><b><span style="font-family: inherit;">Câu 4 (4.0 điểm)</span></b><br /><span style="font-family: inherit;">Cho tam giác $ABC$ và $M, N$ là hai điểm di động trên đường thẳng $BC$ sao cho $\overrightarrow{MN}=\overrightarrow{BC}$. Đường thẳng $d_1$ đi qua $M$ và vuông góc với $AC$, đường thẳng $d_2$ đi qua $N$ và vuông góc với $AB$. Gọi $K$ là giao điểm của $d_1$ và $d_2$. Chứng minh rằng trung điểm $I$ của đoạn $AK$ luôn nằm trên một đường thẳng cố định.</span><br /><b><span style="font-family: inherit;">Câu 5 (4.0 điểm)</span></b><br /><span style="font-family: inherit;">Chứng minh rằng trong 39 số tự nhiên liên tiếp bất kỳ luôn có ít nhất một số có tổng các chữ số chia hết cho 11.</span><br /><span style="font-family: inherit;"><b>Câu 6 (5,0 điểm). </b> </span><br />Giải hệ phương trình: $\left\{ \begin{align}<br />& 9{{y}^{4}}+24{{y}^{3}}-x{{y}^{2}}+7{{y}^{2}}=16-x+24y \\<br />& 8{{y}^{3}}+9{{y}^{2}}+20y-\sqrt[3]{6y+1}+15=x \\<br />\end{align} \right.\,\,(x,y\in \mathbb{R}\,)$<br /><b><span style="font-family: inherit;"><br />Câu 7 (5,0 điểm). </span></b><br /><span style="font-family: inherit;">Cho các số thực dương x, y, z thỏa mãn: $xyz = 8$. Tìm giá trị nhỏ nhất của:</span><br /><span style="font-family: inherit;">$P=\frac{1}{{{\left( 1+x \right)}^{3}}}+\frac{8}{{{\left( 2+y \right)}^{3}}}+\frac{64}{{{\left( 4+z \right)}^{3}}}$.</span><br /><b><span style="font-family: inherit;">Câu 8 (5,0 điểm). </span></b><br /><span style="font-family: inherit;">Cho hai đường tròn $(I)$ và $(J)$ cắt nhau tại $A$ và $B$ sao cho $IA\perp JA$. Đường thẳng $IJ$ cắt hai đường tròn tại $C, E, D, F$ sao cho các điểm $C, I, E, D, J, F$ nằm trên đường thẳng theo thứ tự đó. $BE$ cắt đường tròn $(I)$ tại điểm thứ hai $K$ và cắt $AC$ tại $M$. $BD$ cắt đường tròn $(J)$ tại điểm thứ hai $L$ và $AF$ tại $N$.</span><br /><span style="font-family: inherit;">a) Chứng minh rằng: $MN\bot AB$.</span><br /><span style="font-family: inherit;">b) Chứng minh rằng: $KE.LN.ID=JE.KM.LD$.</span><br /><span style="font-family: inherit;"><b>Câu 9 (5,0 điểm).</b> </span><br /><span style="font-family: inherit;">Cho các số nguyên dương $n, k, p$ với $k\ge 2$ và $k\left( p+1 \right)\le n$. Cho n điểm phân biệt cùng nằm trên một đường thẳng. Tô n điểm đó bằng hai màu xanh, đỏ (mỗi điểm chỉ tô đúng một màu). Tìm số cách tô màu khác nhau, sao cho các điều kiện sau đồng thời được thỏa mãn:</span><br /><span style="font-family: inherit;">1) Có đúng k điểm được tô bởi màu xanh.</span><br /><span style="font-family: inherit;">2) Giữa hai điểm màu xanh liên tiếp (tính từ trái qua phải) có ít nhất p điểm được tô màu đỏ.</span><br /><span style="font-family: inherit;">3) Ở bên phải điểm tô màu xanh cuối cùng có ít nhất p điểm được tô màu đỏ.</span><br /><span style="font-family: inherit;">(Hai cách tô màu được gọi là khác nhau nếu có ít nhất một điểm được tô màu khác nhau trong hai cách đó).</span><br /><span style="font-family: inherit;"><br /></span> <span style="font-family: inherit;"><b>7. Đề thi chọn đội tuyển trường PTNK, Tp. Hồ Chí Minh năm học 2013 - 2014. <a href="http://forum.vnmath.com/viewtopic.php?f=64&t=54" target="_blank">Xem và thảo luận tại đây/</a></b></span><br /><div style="text-align: justify;"><b style="text-align: left;">8. Đề thi học sinh giỏi Tp. Cần Thơ năm học 2013 - 2014</b></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;"><strong>Câu 1:</strong> Giải hệ phương trình sau:</span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;">$$\left\{\begin{matrix} x^3+3xy^2=25 & & \\x^2+6xy+y^2=10x+6y-1 & & \end{matrix}\right.(x,y\in\mathbb{R})$$</span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;"><strong>Câu 2:</strong> Cho tam giác $ABC$ có ba góc đều nhọn, $AB<AC$, $AH$ là đường cao và $AD$ là đường phân giác trong. Gọi $E, F$ lần lượt là hình chiếu vuông góc của $D$ trêm các cạnh $AC$ và $AB, M$ là giao điểm của $BE$ và $CF$.</span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;">1. Chứng minh ba điểm $A, M, H$ thẳng hàng.</span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;">2. Gọi $K$ là giao điểm của $EF$ và $BC$. Chứng minh $\frac{HB}{HC}=\frac{KB}{KC}$.</span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;">3. Gọi $N$ là giao điểm của $BC$ với đường kính qua $A$ của đường tròn ngoại tiếp tam giác $ABC$. Chứng minh : $\frac{HB}{HC}\frac{NB}{NC}<1$</span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;"><strong>Câu 3:</strong> Cho $a, b, c$ ;à ba số nguyên khác không và thỏa mãn $a^2b+b^2c+c^2a=3abc(1)$</span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;">1. Hãy chỉ ra một bộ số nguyên $a, b, c$ đôi một khác nhau thỏa$(1)$</span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;">2. Chứng minh $abc$ là lập phương của một số nguyên.</span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;"><strong>Câu 4:</strong> Cho các đa thức $P(x), Q(x)$ với hệ số thức thỏa mãn điều kiệm $P(x)=Q(x)+Q(1-x),\forall x\in\mathbb{R}$. Biết $P(0)=0$ và các hệ số của $P(x)$ đều không âm. Tính $P(P(2013))$.</span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;"><strong>Câu 5:</strong> Tìm tất cả các hàm số $f:\mathbb{Z}\mapsto \mathbb{Z}$ thỏa mãn các điều kiện :</span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;">$$\left\{\begin{matrix} f(0)=1 & & \\f \left ( f(m+n) +m\right )=n & & \end{matrix}\right.\forall m, n\in\mathbb{Z}$$</span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;"><strong>Câu 6:</strong> Một bảng ô vuông không giới hạn số dòng, số cột và trên đó mới chỉ ghi hai số $1$ và $3$ vào hai ô khác nhau. Ta thực hiện trò chơi viết thêm số vào các ô vuông như sau: nếu trên bảng có hai số tự nhiên $a$ và $b$ thì được phép viết thêm số $c=a+b+ab$ vào ô vuông còn trống trên bảng. Hỏi bằng cách đó trên bảng có thể xuất hiện được các số $2509$ và $20132014$ hay không? Giải thích tại sao?</span><br /><span style="font-family: inherit; font-size: small;"><br /></span></div><b>9. Đề thi học sinh giỏi tỉnh Long An 2013</b><br /><b>Câu I (5,0 điểm).</b><br />1. Giải phương trình $x^2+6x+1=\left(2x+1 \right)\sqrt{x^2+2x+3}$<br />2. Giải hệ phương trình $$\left\{\begin{matrix}x^3+2x^2=5-2y<br />& \\ \left(15-2x \right)\sqrt{6-x}-\left(4y+9 \right)\sqrt{2y+3}=0<br />\end{matrix}\right.$$<br /><b>Câu II (5,0 điểm).</b><br />1. Trong mặt phẳng toạ độ $Oxy$ cho tam giác $ABC$ cân tại $A$, cạnh $AB$ và $BC$ lần lượt nằm trên các đường thẳng $x - 2y + 1 = 0$, $x - y = 0$. Tìm toạ độ các đỉnh $A$ và $C$ biết bán kính đường tròn ngoại tiếp tam giác $ABC$ bằng $5\sqrt{2}$.<br />2. Cho tam giác $ABC$, gọi $D$ là điểm đối xứng của $C$ qua $AB$, vẽ đường tròn tâm $D$ qua $A$ và $B$. Gọi $M$ là điểm bất kì trên đường tròn đó. Chứng minh rằng $MA^2+MB^2=MC^2$.<br /><b>Câu III (4,0 điểm).</b><br />Cho số thực $\alpha \in \left(0;1 \right)$, xét dãy số $\left(u_{n} \right)$ với<br />$$\left\{\begin{matrix}u_{1}=\alpha <br />& \\ u_{n+1}=\frac{1}{2014}u_{n}^{2}+\frac{2013}{2014}\sqrt{u_{n}}<br />\end{matrix}\right.$$<br />1. Chứng minh rằng $0<u_{n}<1$<br />2. Chứng minh rằng dãy số $\left(u_{n} \right)$ có giới hạn hữu hạn. Tìm giới hạn đó.<br /><b>Câu IV (3,0 điểm).</b> Cho ba số thực dương a,b,c thoả mãn $\frac{1}{2+a}+\frac{1}{2+b}+\frac{1}{2+c}\geq 1$. Chứng minh rằng $$abc\leq 1.$$<br /><b>Câu V (3,0 điểm).</b><br />Cho phương trình $\sqrt{21+4x-x^2}-\frac{3}{4}x+3=m\left(\sqrt{x+3}+2\sqrt{7-x} \right)$. Tìm m để phương trình có nghiệm.<br /><br /><b>10. Đề thi học sinh giỏi tỉnh Quảng Nam 2013. <a href="http://forum.vnmath.com/viewtopic.php?f=64&t=58" target="_blank">Xem và thảo luận tại đây.</a></b><br /><div style="text-align: justify;"><br /></div><div style="text-align: justify;"><b>11. Đề thi học sinh giỏi tỉnh Bình Phước năm 2013 - 2014. <a href="http://forum.vnmath.com/viewtopic.php?f=64&t=55" target="_blank">Xem và thảo luận tại đây.</a></b><br /><br /><b>12. Đề thi học sinh giỏi tỉnh Lạng Sơn 2013</b><br /><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;"><strong>Câu 1.</strong></span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;">Tìm giá trị nhỏ nhất, giá trị lớn nhất của hàm số:</span></div><div style="text-align: justify;">$$y=2x^2-4x+6\sqrt{(x+4)(6-x)}+3$$<br /><br />trên đoạn $[-4;6]$.<br /><br /><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;"><strong>Câu 2.</strong></span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;">Giải phương trình:</span></div>$$\sin 3x + \sin 2x + \sin x + 1 = \cos 3x + \cos 2x - \cos x$$<br /><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;"><strong>Câu 3.</strong></span></div><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;">Giải hệ phương trình:</span></div>$$\left\{\begin{matrix}x^3-3x^2+6x-4=y^3+3y\\ \sqrt{x-3}+\sqrt{y+1}=3 \end{matrix}\right.$$<br /><div style="text-align: justify;"><span style="font-family: inherit; font-size: small;"> </span></div><br /><span style="font-family: inherit; font-size: small;"><strong>Câu 4.</strong></span><br />Cho hình chóp $S.ABCD$ có đáy $ABCD$ là hình vuông tâm $O$, cạnh $a$. Hình chiếu vuông góc của đỉnh $S$ lên mặt phẳng $(ABCD)$ là trung điểm $H$ của đoạn thẳng $AO$. Biết $SH=2a$.<br />a) Tính cosin góc giữa hai mặt phẳng $(SCD)$ và $(ABCD)$.<br />b) Tính khoảng cách giữa hai đường thẳng $AB$ và $SC$.<br /><strong>Câu 5.</strong><br />Cho dãy số $(a_n)$ xác định như sau:<br />$$\left\{\begin{matrix}a_1&=&5 \\ a_{n+1} &=& \frac{a_n^2-2a_n+16}{6}\end{matrix}\right.$$<br />Đặt $$S = \sum_{i=1}^n\frac{1}{a_i+2}$$<br />Tìm $\lim S_n$.<br /><br /><b>13. Đề thi học sinh giỏi tỉnh An Giang 2013</b><br /><b>Câu 1.</b> Cho hàm số $y=x^3-3x$ có đồ thị $(C)$ và đường thẳng $(d):y=m(x-1)+2$. Tìm $m$ để $(d)$ cắt $(C)$ tại 3 điểm phân biệt<br /><b>Câu 2.</b> Tìm giá trị nhỏ nhất của hàm số sau với $x>0$ $$y=f(x)=2x+\dfrac{1}{x}+\sqrt{2\left(1+\dfrac{1}{ x^2}\right)}$$<br /><b>Câu 3.</b> Giải phương trình và hệ phương trình sau :<br />a) $\sin{2x}+\dfrac{1}{2}\tan{x}=\dfrac{3}{2}-\cos{2x}$<br />b) $\begin{cases} y^2-5\sqrt{x}+5=0 \\ \sqrt{x+2}=\sqrt{y^2+2y+3}-\dfrac{1}{5}y^2+y \end{cases}$<br /><b>Câu 4.</b> Trong mặt phẳng $Oxy$ cho hai đường thẳng $(\Delta):x-y+2=0$, $(d):3x+y-4=0$ và điểm $A(2;2)$. Viết phương trình đường tròn $(C)$ đi qua điểm $A$ có tâm nằm trên đường thẳng $d$ và tiếp xúc với đường thẳng $\Delta$.<br /><div style="text-align: left;"><b>Câu 5.</b> Cho hình chóp $S.ABCD$ có $SA=SB=SD=BD=2a$,$AB=BC=a$, $\widehat{CBD}=2\widehat{ADB}$, $\widehat{ABD}=2\widehat{BDC}$. Tính thể tích khối chóp $S.ABCD$ theo $a$.</div><br /><b>14. Đề thi học sinh giỏi thành phố Hải Phòng 2013</b>. <a href="http://forum.vnmath.com/viewtopic.php?f=64&t=34">Xem và thảo luận tại đây</a><br /><br /><b><br /></b> <b>15. Đề thi học sinh giỏi tỉnh Bắc Ninh 2013. <a href="http://forum.vnmath.com/viewtopic.php?f=64&t=20" target="_blank">Xem và thảo luận tại đây</a></b><br /><br /><b>16. Đề thi học sinh giỏi tỉnh Bến Tre 2013</b><br /><b>Câu 1.</b><br />a) Từ đỉnh $Q$ của một hình bình hành $PQRS$ kẻ các đường thẳng $QE$ vuông góc với $RS$($E$ thuộc đoạn $RS$, $E$ khác $R$ và khác $S$) và $QK$ vuông góc cới $PS$ ($K$ thuộc đoạn $PS$, $K$ khác $P$ và khác $S$). Biết $KE=x$; $QS=y$ ($y>x$). Gọi $H$ là trực tâm của tam giác $QEK$. Tính $QH$ theo $x$ và $y$.<br />b) Trong mặt phẳng với hệ tọa độ $Oxy$ gọi $(d)$ là đường thẳng cắt parabol $(P)$: $y^2=4x$ tại hai điểm phân biệt $A, B$ ($A, B$ khác gốc tọa độ $O$) sao cho tam giác $OAB$ vuông tại $O$. Chứng minh rằng đường thẳng $(d)$ luôn đi qua một điểm cố định.<br /><b>Câu 2.</b><br />a) Cho $f(x)$ là một đa thức với hệ số nguyên. Chứng minh rằng nếu n số $f(0), f(1), f(2), ..., f(n-1)$ đều không chia hết cho $n$ ($n$ là số tự nhiên, $n\ge 2$) thì phương trình $f(x)=0$ không có nghiệm nguyên.<br />b) Từ các chữ số 1, 2, 3, 4, 5, 6 có thể lập được bao nhiêu số tự nhiên có 6 chữ số khác nhau và tính tổng của tất cả các số vừa tìm.<br /><b>Câu 3. </b>Giải phương trình và hệ phương trình sau:<br />a) $\sqrt{x+8}+\dfrac{9x}{\sqrt{x+8}}-6\sqrt{x}=0$.<br />b) $\left\{ \begin{matrix}<br />{{x}^{2}}=2x-y \\<br />{{y}^{2}}=2y-z \\<br />{{z}^{2}}=2z-t \\<br />{{t}^{2}}=2t-x \\<br />\end{matrix} \right.$<br /><b>Câu 4. </b>Có ba trường học mỗi trường có $n$ học sinh. Một học sinh bất kỳ có tổng số người quen từ hai trường học kia là $n+1$. Chứng minh rằng có thể chọn được ở mỗi trường học một học sinh sao cho ba học sinh này quen lẫn nhau.<br /><br /><b>17. Đề thi học sinh giỏi tỉnh Bà Rịa Vũng Tàu 2013</b><br /><b>Câu 1. (4 điểm)</b> Giải phương trình sau trên tập số thực<br />$$8x^3-12x^2+5x=\sqrt[3]{3x-2}.$$<br /><br /><b>Câu 2. (4 điểm)</b> Cho dãy số $(x_{n})$ xác định bởi $$\left\{\begin{matrix} x_1=2013 & \\ x_{n+1}=\dfrac{x_{n}^{2}+8}{2(x_n-1)},n\in N^* & \end{matrix}\right.$$<br />Chứng minh dãy số $(x_{n})$ có giới hạn và tìm giới hạn đó.<br /><br /><b>Câu 3. (4 điểm)</b> Cho tam giác $ABC$ không cân, nội tiếp đường tròn $(O)$. Hai tiếp tuyến của đường tròn $(O)$ tại $B$ và $C$ cắt nhau tại điểm $I$. Đường thẳng $AI$ cắt đường tròn $(O)$ tại điểm $D$ ($D$ khác $A$). Gọi $M,K$ lần lượt là là trung điểm của $BC$ và $AD$. Hai đường thẳng $BK$ và $AM$ lần lượt cắt $(O)$ tại điểm thứ hai là $E,F$.<br /><ol style="list-style-type: lower-alpha;"><li> Chứng minh $\widehat{BAD}=\widehat{MAC}$.</li><li> Chứng minh hai đường thẳng $EF$ và $AB$ song song với nhau.</li></ol><br /><b>Câu 4. (4 điểm)</b> Tìm tất cả các hàm số $f:\mathbb{R}\to\mathbb{R}$ thoả mãn điều kiện:<br />$$f(xy+f(x))+f(x-yf(x))=2x, \forall x,y \in \mathbb{R}.$$<br /><br /><b>Câu 5. (4 điểm)</b> Người ta xếp $2014$ bóng đèn đang bật sáng thành một hàng dài, từ trái sang phải. Hai người cùng thực hiện một trò chơi như sau: Lần lượt từng người chọn tuỳ ý $5$ bóng đèn liên tiếp, trong đó bóng đèn đầu tiên bên trái trong $5$ bóng đèn được chọn phải đang sáng và thay đổi trạng thái của $5$ bóng đèn đó (từ sáng thành tắt và từ tắt thành sáng). Ai không thể thực hiện được nữa thì thua cuộc. Chứng minh rằng đến một lúc nào đó trò chơi phải kết thúc và dù cho có chơi như thế nào thì người đầu tiên luôn thua cuộc.<br /><br /><b>18. Đề thi học sinh giỏi tỉnh Đồng Nai 2013</b><br /><b>Câu 1.</b><br />Cho hàm số $y=x^3+3ax^2+3bx$ (với $a,b$ là hai tham số thực,$x$ là biến thực).Chứng minh rằng đồ thị hàm số đã cho có hai điểm cực trị A và B thỏa $AB >2$ khi và chỉ khi $2(a^2-b)>1$.<br /><b>Câu 2.</b><br />Giải hệ phương trình:$$\left\{\begin{matrix}<br />x^2y+xy+2x-12y-24=0 & & \\ <br />x^3-y^3=2(x^2+y^2+xy)+3(x-y-2)& & <br />\end{matrix}\right.$$<br /><b>Câu 3.</b><br />Giải phương trình:$cos(2x).cot(2x)=cosx.cotx$<br /><b>Câu 4.</b><br />Cho a,b,c là ba số thực đều lớn 1 thỏa $a+b+c=abc$.<br />Tìm giá trị nhỏ nhất của $P=\frac{a-2}{b^2}+\frac{b-2}{c^2}+\frac{c-2}{a^2}$.<br /><b>Câu 5.</b><br />Cho hình chóp S.ABCD có đáy ABCD là hình vuông cạnh $2a$,với $a>0$.Biết SAB là tam giác đều,góc giữa mp(SCD) và đáy bằng 60 độ.Gọi điểm H là hình chiếu của S lên mặt đáy,H ở trong hình vuông ABCD.Gọi M là trung điểm cạnh AB.<br />Tính thể tích khối chóp S.ABCD theo $a$.Tính khoảng cách giữa hai đường thẳng SM và AC theo $a$.<br /><b>Câu 6.</b><br />Gọi T là tập hợp tất cả các số tự nhiên gồm có 4 chữ số phân biệt được chọn từ các chữ số 0,1,2,3,4,5,6,7.<br />Xác định số phần tử của T.Chọn ngẫu nhiên một số phân biệt từ tập T,tính sác xuất để số được chọn là số chia hết cho 6.<br /><b>19. Đề thi chọn đội tuyển học sinh tỉnh Khánh Hòa năm 2013-2014</b><br /><b>Bài 1. </b>Giải phương trình $\tan^23x+2\tan3x.tan4x-1=0\\$ <br /><b>Bài 2.</b> Cho dãy số $(u_n)$ thỏa mãn $u_1=\frac{1}{2}$, $u_{n+1}=u^2_n-u_n$ với mọi $n \in \mathbb{N^*}$. Chứng minh dãy có giới hạn hữu hạn và tìm giới hạn đó. <br /><b>Bài 3. </b>Tìm tất cả các số tự nhiên $n$ sao hco $3^n+5$ là số chính phương . <br /><b>Bài 4.</b> Cho tam giác nhọn $ABC$ có trực tâm $H$. Trên các đoạn $HB,HC$ lần lượt lấy 2 điểm $B_1, C_1$ sao cho $\widehat{AB_1C}=\widehat{AC_1B}=90$ độ. Chứng minh $AB_1=AC_1$. <br /><b>Bài 5. </b>Cho số nguyên $n>1$. Có tất cả bao nhiêu dãy số $(x_1,x_2,...,x_n)$ với $x_i \in \{a,b,c\}, i=1,2,...,n$ thỏa $x_1=x_n=a$ và $x_i$ khác $x_{i+1}$ khi $i=1,2,...,n-1$. <br /><b>20. Đề thi học sinh giỏi tỉnh Yên Bái 2013</b><br /><b>Câu 1 </b><br />Giải hệ phương trình $\left\{\begin{matrix} x-\frac{1}{x^{3}}=y-\frac{1}{y^{3}}\\ (x-4y)(2x-y+4)=-36 \end{matrix}\right.$<br /><b>Câu 2 </b><br />Giải phương trình: $64\cos^{6}x+56\cos^{2}x=2\sqrt{1-\cos^{2}x}+112\cos^{2}4x+7$, với $x\in \left [ 0;2\pi \right ]$<br /><b>Câu 3</b><br />Cho hai số thực $x,y$ thỏa mãn điều kiện:<br />$$\left\{\begin{matrix} 3x+y-3\geq 0\\ 3x-y-3\leq 0 \\ 2y-x-6\leq 0 \end{matrix}\right.$$<br />Hãy tìm giá trị lớn nhất của biểu thức: $S=2x(x-1)-4(y+x)+2(y^{2}+x)$<br /><b>Câu 4</b><br />1. Cho tứ giác lồi $ABCD$ biết hai cạnh $AB$ và $BC$ có độ dài không đổi $AB=a$, $BC=b$ và tam giác $ACD$ là tam giác đều.<br />Tính độ dài $AC$ theo $a$ và $b$ khi $BD$ có độ dài lớn nhất.<br />2. Trên một khu rừng đủ rộng, người ta trồng nhiều cây thông con. Xem các gốc cây thông là các điểm (đường kính gốc cây không đáng kể). Chứng minh rằng nếu ta trồng cây sao cho các tam giác có đỉnh là các điểm tạo bởi các gốc cây thông đều có diện tích không quá $500 m^2$ thì tồn tại một tam giác có diện tích không quá $2014 m^2$,chứa tất cả các cây thông này.<br /><b>Câu 5</b><br />Tìm hàm số $f:(0;+\propto )\rightarrow \mathbb{R}$ thỏa mãn điều kiện:<br />$$\left\{\begin{matrix} f(1)=\frac{1}{2}\\ f(xy)=f(x).f\left ( \frac{2014}{x} \right )+f(y).f\left ( \frac{2014}{x} \right ),\forall x,y\in (0;+\propto ) \end{matrix}\right.$$<br /><b>20. Đề thi học sinh giỏi tỉnh Trà Vinh 2013. <a href="http://forum.vnmath.com/viewtopic.php?f=64&t=56" target="_blank">Xem và thảo luận tại đây.</a></b><br /><br /><b>21. Đề thi học sinh giỏi tỉnh Ninh Bình 2013. <a href="http://forum.vnmath.com/viewtopic.php?f=64&t=57" target="_blank">Xem và thảo luận tại đây.</a></b><br /><br /><b>22. Đề thi học sinh giỏi tỉnh Phú Thọ 2013</b><br /><b>Câu 5:</b> Tìm tất cả các đa thức $P(x), Q(x)$ có hệ số thực với hệ số bậc cao nhất bằng $1$ và thỏa mãn điều kiện<br />$$P(1)+P(2)+...+P(n)=Q(1+2+...+n),\forall n\in\mathbb{N}^*.$$<br /><b>Câu 6:</b> Tìm tất cả các số nguyên dương $n$ có đúng $12$ ước nguyên dương thỏa đồng thời các điều kiện sau<br /><ul><li> $1=d_1<d_2<...<d_{12}=n$,</li><li> $d_{d_4-1}=d_8(d_1+d_2+d_4)$.</li></ul><b>Câu 7:</b> Cho tam giác $ABC$ nội tiếp đường tròn $(O)$, bán kính $R$. Gọi $I$ là tâm đường tròn nội tiếp tam giác $ABC$; $I_a,I_b,I_c$ lần lượt là tâm đường tròn bàng tiếp góc $A,B,C$ của tam giác $ABC$. $X,Y,Z$ lần lượt là tâm đường tròn ngoại tiếp tam giác $OBC,OCA,OAB$. $K$ là tâm đường tròn ngoại tiếp tam giác $XYZ$. $P$ đối xứng với $I$ qua $O$. Chứng minh rằng<br /><ol class="lower-alpha"><li> Đường tròn ngoại tiếp tam giác $I_aI_bI_c$ có tâm là $P$ và bán kính bằng $2R$.</li><li> Điểm $K$ nằm trên đường thẳng Euler của tam giác $ABC$.<br /><br /></li></ol><span style="color: blue; text-align: start;"><b>Bài viết được cắt ra do quá dài. <a href="" style="text-align: start;">Xem tiếp Phần 2 ở đây.</a></b></span></div></div></div>Unknownnoreply@blogger.comtag:blogger.com,1999:blog-6690046711930903487.post-59600265100692835462015-07-10T01:13:00.000-07:002015-10-15T05:32:38.238-07:00Giải câu 10 trong đề thi THPT quốc gia 2015 bằng nhiều cách<p><strong>Câu 10. </strong>Cho các số thực $ a,b,c $ thuộc đoạn $ [1;3] $ và thỏa mãn $ a+b+c=6 $. Tìm giá trị lớn nhất của biểu thức \[ P=\dfrac{a^2b^2+b^2c^2+c^2a^2+12abc+72}{ab+bc+ca}-\dfrac{1}{2}abc. \]<br /><br /><b>Cách 1.</b><br />Ta có $ a^2b^2+b^2c^2+c^2a^2=(ab+bc+ca)^2-2abc(a+b+c)=(ab+bc+ca)^2-12abc $ và $ (a-1)(b-1)(c-1)\geqslant 0\Leftrightarrow abc+a+b+c-ab-bc-ca-1\geqslant0\Rightarrow abc\geqslant ab+bc+ca-5 $.<br />Do đó \[ P\leqslant \dfrac{(ab+bc+ca)^2+72}{ab+bc+ca}-\dfrac{1}{2}(ab+bc+ca-5). \]<br />Nếu đặt $ ab+bc+ca=t $ thì $ P\leqslant t+\dfrac{72}{t}-\dfrac{t}{2}+\dfrac{5}{2}=\dfrac{t}{2}+\dfrac{72}{t}+\dfrac{5}{2}$.<br />Mặt khác ta có \[(3-a)(3-b)(3-c)\geqslant 0 \Leftrightarrow 27+3(ab+bc+ca)\geqslant 9(a+b+c)+abc\geqslant 54+ab+bc+ca-5,\] suy ra $ ab+bc+ca\geqslant 11 $.<br />Kết hợp với $ (a+b+c)^2\geqslant 3(ab+bc+ca)\Rightarrow ab+bc+ca\leqslant 12 $ để có $11\leqslant t\leqslant 12 $.<br />Hàm số $ f(t)=\dfrac{t}{2}+\dfrac{72}{t}+\dfrac{5}{2} $ có $ f'(t)=\dfrac{1}{2}-\dfrac{72}{t^2}=\dfrac{(t-12)(t+12)}{2t^2}\leqslant 0 $ với mọi $ t\in [11;12] $ nên hàm $ f(t) $ nghịch biến trên $[11;12] $, dẫn đến $ P=f(t)\leqslant f(11)=\dfrac{160}{11} $.<br />Vậy GTLN của $ P $ bằng $\dfrac{160}{11}$ đạt tại $ a=1, b=2, c=3 $ và các hoán vị của nó.<br /><br /><b>Cách 2.</b><br />Đặt $p=a+b+c=6, q=ab+bc+ca, r=abc$ và $f(x)=x^3-6x2+qx-r$.<br />Ta có $ a^2b^2+b^2c^2+c^2a^2=(ab+bc+ca)^2-2abc(a+b+c)=(ab+bc+ca)^2-12abc $ và $f'(x)=3x^2-12x+q$.<br />Khi đó $$P=q+\frac{72}{q}-\frac{r}{2}$$ và $a, b, c$ là nghiệm của phương trình $f(x)=0$.<br />Vì $a, b, c\in [1,3]$ nên $f(1)\leq 0, f(3)\geq 0, \Delta_{f'}\geq 0$.<br />Suy ra $r\geq q-5, r\leq 3q-27, 11\leq q\leq 12$.<br />Từ đó $$P\leq q+\frac{72}{q}-\frac{q-5}{2}=\frac{q}{2}+\frac{72}{q}+\frac{5}{2}.$$<br />$P$ lớn nhất khi $r=q-5$.<br />Vậy GTLN của $ P $ bằng $\dfrac{160}{11}$ đạt tại $ a=1, b=2, c=3 $ và các hoán vị của nó.<br /><br /><strong>Câu 9.</strong> Giải phương trình $ \dfrac{x^2+2x-8}{x^2-2x+3}=(x+1)(\sqrt{x+2}-2) $ trên tập số thực.<br /><br /><b>Cách 1.</b><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhEUwI-Wicn7Yt25YVwdWQ0xkBqjuL7oI0W4dmCmlNDFPOhfP_bBOE0bkhkUSKYeu-1gCo1p3_WporCyMnjM1_LqE4e-i776FS3_hyIYfrPHcExeBulBAtEaweVX9eYQLiHZy4em8T2zifs/s1600/cach+1.PNG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="330" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhEUwI-Wicn7Yt25YVwdWQ0xkBqjuL7oI0W4dmCmlNDFPOhfP_bBOE0bkhkUSKYeu-1gCo1p3_WporCyMnjM1_LqE4e-i776FS3_hyIYfrPHcExeBulBAtEaweVX9eYQLiHZy4em8T2zifs/s640/cach+1.PNG" width="640" /></a></div><b>Cách 2. </b> Đặt $t=\sqrt{x+2}$. <br />Khi đó phương trình đã cho có dạng $-t^7+2 t^6+7 t^5-13 t^4-17 t^3+32 t^2+11 t-30=0$ <br />hay $(t-2) (t^2-t-3) (t^4+t^3-3 t^2-t+5) =0$. <br /><script src="http://cdn.mathjax.org/mathjax/latest/MathJax.js" type="text/javascript">MathJax.Hub.Config({ extensions: ["tex2jax.js","TeX/AMSmath.js","TeX/AMSsymbols.js"], jax: ["input/TeX", "output/HTML-CSS"], tex2jax: { inlineMath: [ ['$','$'], ["\\(","\\)"] ], displayMath: [ ['$$','$$'], ["\\[","\\]"] ], }, "HTML-CSS": { availableFonts: ["TeX"] } }); </script></p>Unknownnoreply@blogger.comtag:blogger.com,1999:blog-6690046711930903487.post-4822599932658366902015-07-04T20:11:00.000-07:002015-10-15T05:32:38.272-07:00Đáp án chính thức đề thi THPT quốc gia 2015 tất cả các môn<div style="background-color: white; border: 0px; color: #666666; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin-bottom: 5px; padding: 5px 0px;"><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi5QLpzc7tDtGiyr8fAMti25dV5Y5K-8jNfyBjcIp88ldBGniU8IJIf2mUhHjesm2c2MXnIPYoOUo35I0ELGF6KT8FLKpkTSruCHaNeWsEs58y-bpr1RhLKAmQS87U0roAu1q5r2aN3eBQ/s1600/DAPAN.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="135" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi5QLpzc7tDtGiyr8fAMti25dV5Y5K-8jNfyBjcIp88ldBGniU8IJIf2mUhHjesm2c2MXnIPYoOUo35I0ELGF6KT8FLKpkTSruCHaNeWsEs58y-bpr1RhLKAmQS87U0roAu1q5r2aN3eBQ/s1600/DAPAN.jpg" width="320" /></a></div><br /><br />Bộ GD-ĐT vừa công bố đáp án chính thức 8 môn thi THPT quốc gia 2015. VNMATH gửi tới bạn đọc đáp án và thang điểm chính thức từ bộ Giáo dục và Đào tạo.</div><center style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;"><table align="center" border="1" cellpadding="1" cellspacing="0" style="border-collapse: collapse; border-spacing: 0px; border: 0px; font-size: 12px; margin: 10px 0px; padding: 0px; width: 300px;"><tbody style="border: 0px; margin: 0px; padding: 0px;"><tr style="border: 0px; margin: 0px; padding: 0px;"><td style="border: 0px; margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; padding: 0px;" /><strong style="border: 0px; margin: 0px; padding: 0px;">Môn</strong></td><td style="border: 0px; margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; padding: 0px;" /><strong style="border: 0px; margin: 0px; padding: 0px;">Đề thi</strong></td><td style="border: 0px; margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; 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margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; padding: 0px;" /><a href="http://c0.attachment.vnecdn.net/document/2015/07/04/18/davanct-qg-k15-1436010432.pdf" rel="file" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; border: 0px; color: #444444; font-weight: bold; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;" target="_blank">Văn</a></td><td style="border: 0px; margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; padding: 0px;" /><a href="http://c0.attachment.vnecdn.net/document/2015/07/04/18/devanct-qg-k15-1436010454.pdf" rel="file" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; border: 0px; color: #444444; font-weight: bold; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;" target="_blank">Đáp án</a></td></tr><tr style="border: 0px; margin: 0px; padding: 0px;"><td style="border: 0px; margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; padding: 0px;" />Sử</td><td style="border: 0px; margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; padding: 0px;" /><a href="http://c0.attachment.vnecdn.net/document/2015/07/04/18/dasuct-qg-k15-1436010498.pdf" rel="file" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; border: 0px; color: #444444; font-weight: bold; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;" target="_blank">Sử</a></td><td style="border: 0px; margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; padding: 0px;" /><a href="http://c0.attachment.vnecdn.net/document/2015/07/04/18/desuct-qg-k15-1436010513.pdf" rel="file" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; border: 0px; color: #444444; font-weight: bold; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;" target="_blank">Đáp án</a></td></tr><tr style="border: 0px; margin: 0px; padding: 0px;"><td style="border: 0px; margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; padding: 0px;" />Địa</td><td style="border: 0px; margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; padding: 0px;" /><a href="http://c0.attachment.vnecdn.net/document/2015/07/04/18/dadiact-k15-1436010626.pdf" rel="file" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; border: 0px; color: #444444; font-weight: bold; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;" target="_blank">Địa</a></td><td style="border: 0px; margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; padding: 0px;" /><a href="http://c0.attachment.vnecdn.net/document/2015/07/04/18/dediact-k15-1436010643.pdf" rel="file" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; border: 0px; color: #444444; font-weight: bold; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;" target="_blank">Đáp án</a></td></tr><tr style="border: 0px; margin: 0px; padding: 0px;"><td style="border: 0px; margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; padding: 0px;" />Sinh</td><td style="border: 0px; margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; padding: 0px;" /><a href="http://c0.attachment.vnecdn.net/document/2015/07/04/18/desinhct-qg-k15-m159-1436010664.pdf" rel="file" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; border: 0px; color: #444444; font-weight: bold; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;" target="_blank">Sinh</a></td><td style="border: 0px; margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; padding: 0px;" /><a href="http://c0.attachment.vnecdn.net/document/2015/07/04/18/dasinhct-qg-k15-1436010678.pdf" rel="file" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; border: 0px; color: #444444; font-weight: bold; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;" target="_blank">Đáp án</a></td></tr><tr style="border: 0px; margin: 0px; padding: 0px;"><td style="border: 0px; margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; padding: 0px;" />Ngoại ngữ</td><td style="border: 0px; margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; padding: 0px;" /></td><td style="border: 0px; margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; padding: 0px;" /></td></tr><tr style="border: 0px; margin: 0px; padding: 0px;"><td style="border: 0px; margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; padding: 0px;" />Tiếng Anh</td><td style="border: 0px; margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; padding: 0px;" /><a href="http://c0.attachment.vnecdn.net/document/2015/07/04/18/deanhct-qg-k15-m194-1436010797.pdf" rel="file" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; border: 0px; color: #444444; font-weight: bold; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;" target="_blank">Tiến Anh</a></td><td style="border: 0px; margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; padding: 0px;" /><a href="http://c0.attachment.vnecdn.net/document/2015/07/04/18/daanhct-qg-k15-1436010816.pdf" rel="file" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; border: 0px; color: #444444; font-weight: bold; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;" target="_blank">Đáp án</a></td></tr><tr style="border: 0px; margin: 0px; padding: 0px;"><td style="border: 0px; margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; padding: 0px;" />Tiếng Pháp</td><td style="border: 0px; margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; padding: 0px;" /><a href="http://c0.attachment.vnecdn.net/document/2015/07/04/18/dephapct-qg-k15-m259-1436010838.pdf" rel="file" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; border: 0px; color: #444444; font-weight: bold; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;" target="_blank">Tiếng Pháp</a></td><td style="border: 0px; margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; padding: 0px;" /><a href="http://c0.attachment.vnecdn.net/document/2015/07/04/18/daphapct-qg-k15-1436010851.pdf" rel="file" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; border: 0px; color: #444444; font-weight: bold; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;" target="_blank">Đáp án</a></td></tr><tr style="border: 0px; margin: 0px; padding: 0px;"><td style="border: 0px; margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; padding: 0px;" />Tiếng Đức</td><td style="border: 0px; margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; padding: 0px;" /><a href="http://c0.attachment.vnecdn.net/document/2015/07/04/18/deducct-qg-k15-m139-1436010871.pdf" rel="file" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; border: 0px; color: #444444; font-weight: bold; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;" target="_blank">Tiếng Đức</a></td><td style="border: 0px; margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; padding: 0px;" /><a href="http://c0.attachment.vnecdn.net/document/2015/07/04/18/daducct-qg-k15-1436010888.pdf" rel="file" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; border: 0px; color: #444444; font-weight: bold; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;" target="_blank">Đáp án</a></td></tr><tr style="border: 0px; margin: 0px; padding: 0px;"><td style="border: 0px; margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; padding: 0px;" />Tiếng Nga</td><td style="border: 0px; margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; padding: 0px;" /><a href="http://c0.attachment.vnecdn.net/document/2015/07/04/18/dengact-qg-k15-m152-1436010907.pdf" rel="file" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; border: 0px; color: #444444; font-weight: bold; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;" target="_blank">Tiếng Nga</a></td><td style="border: 0px; margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; padding: 0px;" /><a href="http://c0.attachment.vnecdn.net/document/2015/07/04/18/dangact-qg-k15-1436010928.pdf" rel="file" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; border: 0px; color: #444444; font-weight: bold; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;" target="_blank">Đáp án</a></td></tr><tr style="border: 0px; margin: 0px; padding: 0px;"><td style="border: 0px; margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; padding: 0px;" />Tiếng Nhật</td><td style="border: 0px; margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; padding: 0px;" /><a href="http://c0.attachment.vnecdn.net/document/2015/07/04/18/denhatct-qg-k15-m147-1436010945.pdf" rel="file" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; border: 0px; color: #444444; font-weight: bold; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;" target="_blank">Tiếng Nhật</a></td><td style="border: 0px; margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; padding: 0px;" /><a href="http://c0.attachment.vnecdn.net/document/2015/07/04/18/danhatct-qg-k15-1436010956.pdf" rel="file" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; border: 0px; color: #444444; font-weight: bold; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;" target="_blank">Đáp án</a></td></tr><tr style="border: 0px; margin: 0px; padding: 0px;"><td style="border: 0px; margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; padding: 0px;" />Tiếng Trung</td><td style="border: 0px; margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; padding: 0px;" /><a href="http://c0.attachment.vnecdn.net/document/2015/07/04/18/detrungct-qg-k15-m358-1436010977.pdf" rel="file" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; border: 0px; color: #444444; font-weight: bold; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;" target="_blank">Tiếng Trung</a></td><td style="border: 0px; margin: 0px; padding: 0px; vertical-align: top;"><br style="margin: 0px; padding: 0px;" /><a href="http://c0.attachment.vnecdn.net/document/2015/07/04/18/datrungct-qg-k15-1436010994.pdf" rel="file" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; border: 0px; color: #444444; font-weight: bold; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;" target="_blank">Đáp án</a></td></tr></tbody></table></center><a href="https://drive.google.com/file/d/0B1UntQgSATvxeXBNWDgtZEJoeGs/view?usp=sharing" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">ĐÁP ÁN CHÍNH THỨC ĐỀ THI THPT 2015 MÔN TOÁN CỦA BỘ GDĐT</a><br /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><a href="https://drive.google.com/file/d/0B1UntQgSATvxVjRTQjVxRHNLcjA/view?usp=sharing" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">ĐÁP ÁN CHÍNH THỨC ĐỀ THI THPT 2015 MÔN NGỮ VĂN CỦA BỘ GDĐT</a><br /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><a href="http://c0.attachment.vnecdn.net/document/2015/07/04/18/dalict-qg-k15-1436010192.pdf" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">ĐÁP ÁN CHÍNH THỨC ĐỀ THI THPT 2015 MÔN VẬT LÍ CỦA BỘ GDĐT</a><br /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><a href="http://c0.attachment.vnecdn.net/document/2015/07/04/18/dahoact-qg-k15-1436010406.pdf" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">ĐÁP ÁN CHÍNH THỨC ĐỀ THI THPT 2015 MÔN HÓA HỌC CỦA BỘ GDĐT</a><br /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><a href="http://c0.attachment.vnecdn.net/document/2015/07/04/18/dasinhct-qg-k15-1436010678.pdf" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">ĐÁP ÁN CHÍNH THỨC ĐỀ THI THPT 2015 MÔN SINH HỌC CỦA BỘ GDĐT</a><br /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><a href="http://c0.attachment.vnecdn.net/document/2015/07/04/18/daanhct-qg-k15-1436010816.pdf" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">ĐÁP ÁN CHÍNH THỨC ĐỀ THI THPT 2015 MÔN TIẾNG ANH CỦA BỘ GDĐT</a><br /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><a href="http://c0.attachment.vnecdn.net/document/2015/07/04/18/dediact-k15-1436010643.pdf" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">ĐÁP ÁN CHÍNH THỨC ĐỀ THI THPT 2015 MÔN ĐỊA LÍ CỦA BỘ GDĐT</a><br /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><a href="http://c0.attachment.vnecdn.net/document/2015/07/04/18/desuct-qg-k15-1436010513.pdf" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">ĐÁP ÁN CHÍNH THỨC ĐỀ THI THPT 2015 MÔN LỊCH SỬ CỦA BỘ GDĐT</a>Unknownnoreply@blogger.comtag:blogger.com,1999:blog-6690046711930903487.post-24011976938812201552015-07-02T18:41:00.000-07:002015-10-15T05:32:38.307-07:00Đáp án Đề thi THPT Quốc gia môn Toán năm 2015<div style="background-color: white; border: 0px; color: #666666; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin-bottom: 5px; padding: 5px 0px;"><b style="border: 0px; margin: 0px; padding: 0px;">Đề thi THPT Quốc gia môn Toán</b> năm 2015 thi sáng 1/7/2015.</div><div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-align: center;"><a href="http://l.f30.img.vnecdn.net/2015/07/01/dedep_660x0.jpg" imageanchor="1" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; border: 0px; color: #444444; font-weight: bold; margin: 0px 1em; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;"><img alt="Đáp án Đề thi THPT Quốc gia môn Toán năm 2015 dap an de thi thpt quoc gia mon toan 2015" border="0" src="http://l.f30.img.vnecdn.net/2015/07/01/dedep_660x0.jpg" style="border: none; margin: 0px; padding: 0px;" title="Đáp án Đề thi THPT Quốc gia môn Toán năm 2015" width="610" /></a></div><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">Nhận xét về đề thi:</b><br /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;"><br style="margin: 0px; padding: 0px;" /></b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;">Đề thi Toán gồm 10 câu hỏi, mỗi câu 1 điểm. Đề thi được sắp xếp theo mức độ khó tăng dần rất thuận lợi cho thí sinh khi làm bài. So với các năm gần đây đề thi năm nay có phần nhẹ nhàng hơn. Thí sinh học khá có thể làm được 7 điểm một cách dễ dàng. Hơn nữa đề thi bám sát với tinh thần của Đề minh họa mà Bộ giáo dục đã công bố cách đây vài tháng.</span><br /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;">Các câu từ 1 đến 7 rất cơ bản và có nhiều bài tập tương tự nằm trong sách giáo khoa. Thí sinh không cần học thêm nhiều có thể làm được các câu này.</span><br /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;">Các câu từ 8 đến 10 dành cho thí sinh biết vận dụng đến vận dụng ở mức độ cao các kiến thức đã học. Riêng tìm giá trị lớn nhất (câu 10) thì dễ tiếp cận hơn các câu loại này năm trước. Dự kiến là sẽ có nhiều điểm 10 môn toán.</span><br /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">Bài giải Đề thi THPT quốc gia môn Toán 2015 của thầy Nguyễn Duy Hiếu, GV THPT chuyên Lê Hồng Phong, Thành phố Hồ Chí Minh. <a href="https://drive.google.com/file/d/0B1UntQgSATvxQk1TTHBXUUVwZkk/view?usp=sharing" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; border: 0px; color: #444444; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;" target="_blank">Download.</a></b><br /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">Gợi ý giải Đề thi THPT Quốc gia môn Toán năm 2015 từ báo Tuổi trẻ:</b><br /><div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-align: center;"><a href="http://static.new.tuoitre.vn/tto/r/2015/07/01/bai-giai-hoan-chinh-1435727671.jpg" imageanchor="1" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; border: 0px; color: #00e6ff; font-weight: bold; margin: 0px 1em; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;"><img border="0" src="http://static.new.tuoitre.vn/tto/r/2015/07/01/bai-giai-hoan-chinh-1435727671.jpg" style="border: none; margin: 0px; padding: 0px;" width="610" /></a></div><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">Đáp án chính thức </b><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">Đề thi THPT Quốc gia môn Toán năm 2015 </b><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">của Bộ:</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> Cập nhật sau đợt thi.</span>Unknownnoreply@blogger.comtag:blogger.com,1999:blog-6690046711930903487.post-4387826731613199052015-06-28T19:22:00.000-07:002015-10-15T05:32:38.360-07:00Đề thi vào lớp 10 môn toán năm học 2015 - 2016 <div style="background-color: white; border: 0px; color: #666666; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin-bottom: 5px; padding: 5px 0px;"><b style="border: 0px; margin: 0px; padding: 0px;">1. Đề thi vào lớp 10 Phổ thông Năng khiếu Sài gòn năm học 2015 - 2016.</b></div><div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj9U3jooy9Pop6lqXj7SiJq3INMlaF0vp6uvybb5-YV_0dJoqAltuvje4vTJx-xw-3MPLe3vrIIU2Z-1m_RObfpFtWy6YviwLZUKEDeds_Jg83fyy27dli9-4IaoGR5zgWXQKKTD40SFpRM/s1600/ptnk+2015.JPG" imageanchor="1" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; border: 0px; color: #444444; font-weight: bold; margin: 0px 1em; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj9U3jooy9Pop6lqXj7SiJq3INMlaF0vp6uvybb5-YV_0dJoqAltuvje4vTJx-xw-3MPLe3vrIIU2Z-1m_RObfpFtWy6YviwLZUKEDeds_Jg83fyy27dli9-4IaoGR5zgWXQKKTD40SFpRM/s640/ptnk+2015.JPG" style="border: none; margin: 0px; padding: 0px;" /></a></div><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">2. Đề thi vào lớp 10 chuyên Sư phạm Hà Nội năm học 2015 - 2016.</b><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br /><div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiO9m5mYATe2Jw7fsBGRlFT5mGJlMIhVWTPYnFsQpb6NGMUlco5_bIAGh98JR39_fNO68RUUWFQi3XydjQ4wWMXneyjj2hy7iQ-nQam7cKu-WDUznfLss3GEhvogEfeI_KGBf-0eGFVKTP0/s1600/SPHN+2015+toan+chung.jpg" imageanchor="1" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; border: 0px; color: #444444; font-weight: bold; margin: 0px 1em; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiO9m5mYATe2Jw7fsBGRlFT5mGJlMIhVWTPYnFsQpb6NGMUlco5_bIAGh98JR39_fNO68RUUWFQi3XydjQ4wWMXneyjj2hy7iQ-nQam7cKu-WDUznfLss3GEhvogEfeI_KGBf-0eGFVKTP0/s640/SPHN+2015+toan+chung.jpg" style="border: none; margin: 0px; padding: 0px;" /></a></div><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;">3. Đề thi vào lớp 10 chuyên </span><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">Lê Hồng Phong, Nam Định</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> năm học 2015 - 2016.</span><br /><div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgA12TjdShkhfvR8lINaC2v-mALLfFiFlx2o5urhHvFzTtuMhZU1MgYZSTMHqrhEavhHNusLeSNB3nZcdR-v1K0Vny_Q6DiqosJ_BDem_CE1_IvZJ2Bmi0zDqZMLfv0q7ceUEKFnYGZcxIP/s1600/le+hong+phong+nd+toan+chung+2015.PNG" imageanchor="1" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; border: 0px; color: #444444; font-weight: bold; margin: 0px 1em; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgA12TjdShkhfvR8lINaC2v-mALLfFiFlx2o5urhHvFzTtuMhZU1MgYZSTMHqrhEavhHNusLeSNB3nZcdR-v1K0Vny_Q6DiqosJ_BDem_CE1_IvZJ2Bmi0zDqZMLfv0q7ceUEKFnYGZcxIP/s640/le+hong+phong+nd+toan+chung+2015.PNG" style="border: none; margin: 0px; padding: 0px;" /></a></div><div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiPnSm0uw86hDZZM2_UeZCHuu8cWhVJg01IuyZtqZnhGFg50JLAPyHzTORT6u99-R_lVjNGlGBqhB2ML85cCAa8nJ88CL2FpFqsouW-Kojx4Yx-ByKyc1cHRdwAHYkyJD040K03sAhId8Vw/s1600/le+hong+phong+nam+dinh+toan+chuyen.jpg" imageanchor="1" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; border: 0px; color: #444444; font-weight: bold; margin: 0px 1em; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiPnSm0uw86hDZZM2_UeZCHuu8cWhVJg01IuyZtqZnhGFg50JLAPyHzTORT6u99-R_lVjNGlGBqhB2ML85cCAa8nJ88CL2FpFqsouW-Kojx4Yx-ByKyc1cHRdwAHYkyJD040K03sAhId8Vw/s640/le+hong+phong+nam+dinh+toan+chuyen.jpg" style="border: none; margin: 0px; padding: 0px;" /></a></div><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;">4. Đề thi vào lớp 10 tỉnh </span><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">Vĩnh Long</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> năm học 2015 - 2016.</span><br /><div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg4UL57HUvAf4TtdgE4p2gNWThUJH5jKYLM0t7uxBhDSeKy08DEtEAqvNuWddv1KNp6_eWsSb9gy3T721jjky-ViWJEh2Q3j3DQPn7p9ryBA87tYtZIYks2NFc1nYQ3EAZmgwCnCsx5qTOR/s1600/vinh+long+2015.PNG" imageanchor="1" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; border: 0px; color: #444444; font-weight: bold; margin: 0px 1em; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg4UL57HUvAf4TtdgE4p2gNWThUJH5jKYLM0t7uxBhDSeKy08DEtEAqvNuWddv1KNp6_eWsSb9gy3T721jjky-ViWJEh2Q3j3DQPn7p9ryBA87tYtZIYks2NFc1nYQ3EAZmgwCnCsx5qTOR/s640/vinh+long+2015.PNG" style="border: none; margin: 0px; padding: 0px;" /></a></div><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;">5. Đề thi vào lớp 10 tỉnh </span><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">kHÁNH hÒA</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> năm học 2015 - 2016. </span><a href="https://drive.google.com/file/d/0B1UntQgSATvxZVRidG80WVpDYlE/view?usp=sharing" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">DOWNLOAD.</a><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;">6. Đề thi vào lớp 10 tỉnh</span><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;"> BÌNH DƯƠNG</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> năm học 2015 - 2016. </span><a href="https://drive.google.com/file/d/0B1UntQgSATvxWHZrRVBrWlE1ZHc/view?usp=sharing" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">DOWNLOAD.</a><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">7. Đề thi vào lớp 10 CHUYÊN NGUYỄN QUANG DIÊU, ĐỒNG THÁP năm học 2015 - 2016.</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> </span><a href="https://drive.google.com/file/d/0B1UntQgSATvxZER2c1ZHV1BzbFk/view?usp=sharing" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">DOWNLOAD.</a><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">7. Đề thi vào lớp 10 CHUYÊN Đại học Khoa học Tự Nhiên, Hà Nội năm học 2015 - 2016.</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> </span><a href="https://drive.google.com/" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">DOWNLOAD.</a><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">8. Đề thi vào lớp 10 CHUYÊN LƯƠNG VĂN CHÁNH, PHÚ YÊN năm học 2015 - 2016.</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> </span><a href="https://drive.google.com/file/d/0B1UntQgSATvxRFNhQTBIdWxEQ00/view?usp=sharing" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">DOWNLOAD.</a><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">9. Đề thi vào lớp 10 MÔN TOÁN CHUYÊN TRẦN HƯNG ĐẠO, BÌNH THUẬN năm học 2015 - 2016.</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"></span><a href="https://drive.google.com/file/d/0B1UntQgSATvxM3JHY0tnTFNhZ2M/view?usp=sharing" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">DOWNLOAD.</a><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">10. Đề thi vào lớp 10 MÔN TOÁN CHUYÊN TỈNH NINH THUẬN năm học 2015 - 2016.</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> </span><a href="https://drive.google.com/file/d/0B1UntQgSATvxRWNpWkJvWDhkNkU/view?usp=sharing" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">DOWNLOAD.</a><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">11. Đề thi vào lớp 10 MÔN TOÁN TỈNH HÀ NAM năm học 2015 - 2016.</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> </span><a href="https://drive.google.com/file/d/0B1UntQgSATvxUHFMbEw1aTg0bE0/view?usp=sharing" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">DOWNLOAD.</a><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">12. Đề thi vào lớp 10 MÔN TOÁN CHUYÊN BẾN TRE năm học 2015 - 2016.</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> </span><a href="https://drive.google.com/file/d/0B1UntQgSATvxSXBYMkZxeHM0VFE/view?usp=sharing" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">DOWNLOAD.</a><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">13. Đề thi vào lớp 10 MÔN TOÁN CHUYÊN LÊ HỒNG PHONG SÀI GÒN năm học 2015 - 2016.</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> </span><a href="https://drive.google.com/file/d/0B1UntQgSATvxenNubUpScmNQNTQ/view?usp=sharing" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">DOWNLOAD.</a><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">14. Đề thi vào lớp 10 MÔN TOÁN THÀNH PHỐ HỒ CHÍ MINH năm học 2015 - 2016.</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> </span><br /><div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjCPUnwsBbinZ73xTB4s8k5OGoFZtP-8IWbMZibtsUz_PbNL3IOa0vD2YAtZ0SNJe8Jpv0ALjS_q4ciQgVlqW3KfAMdaFjAYzm_E_fkXrb9_zSlNfgQJSmgoHcKyF6g52UdvlQwsMcEk74W/s1600/detoansg2-2031-1434105092.jpg" imageanchor="1" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; border: 0px; color: #444444; font-weight: bold; margin: 0px 1em; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjCPUnwsBbinZ73xTB4s8k5OGoFZtP-8IWbMZibtsUz_PbNL3IOa0vD2YAtZ0SNJe8Jpv0ALjS_q4ciQgVlqW3KfAMdaFjAYzm_E_fkXrb9_zSlNfgQJSmgoHcKyF6g52UdvlQwsMcEk74W/s640/detoansg2-2031-1434105092.jpg" style="border: none; margin: 0px; padding: 0px;" /></a></div><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">15. Đề thi vào lớp 10 MÔN TOÁN TỈNH BÀ RỊA VŨNG TÀU năm học 2015 - 2016.</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> </span><a href="https://drive.google.com/file/d/0B1UntQgSATvxNkoxMkhKWmFMOFE/view?usp=sharing" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">DOWNLOAD.</a><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">16. Đề thi vào lớp 10 MÔN TOÁN TỈNH NAM ĐỊNH năm học 2015 - 2016.</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> </span><a href="https://drive.google.com/file/d/0B1UntQgSATvxeUFTSXY5YnVhS00/view?usp=sharing" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">DOWNLOAD.</a><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">17. Đề thi vào lớp 10 MÔN TOÁN TỈNH THÁI BÌNH năm học 2015 - 2016.</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> </span><a href="https://drive.google.com/file/d/0B1UntQgSATvxU1ltQXRXaHhwS1U/view?usp=sharing" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">DOWNLOAD.</a><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">18. Đề thi vào lớp 10 MÔN TOÁN CHUYÊN TỈNH VĨNH PHÚC năm học 2015 - 2016.</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> </span><a href="https://drive.google.com/file/d/0B1UntQgSATvxUklfcTg3UjBtd28/view?usp=sharing" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">TOÁN CHUYÊN.</a><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> -- </span><a href="https://drive.google.com/file/d/0B1UntQgSATvxZTNfdTg3T0JLTWc/view?usp=sharing" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">TOÁN CHUNG</a><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">19. Đề thi vào lớp 10 MÔN TOÁN CHUYÊN TỈNH NINH THUẬN năm học 2015 - 2016.</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> </span><a href="https://drive.google.com/file/d/0B1UntQgSATvxRWNpWkJvWDhkNkU/view?usp=sharing" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">DOWNLOAD.</a><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">20. Đề thi vào lớp 10 MÔN TOÁN THÀNH PHỐ ĐÀ NẴNG năm học 2015 - 2016.</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> </span><a href="https://drive.google.com/file/d/0B1UntQgSATvxdk8yUU9TQW5DNHc/view?usp=sharing" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">DOWNLOAD.</a><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">21. Đề thi vào lớp 10 MÔN TOÁN TỈNH HÀ TĨNH năm học 2015 - 2016.</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> </span><a href="https://drive.google.com/file/d/0B1UntQgSATvxMG9vWTNCa3VIdWc/view?usp=sharing" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">DOWNLOAD.</a><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">22. Đề thi vào lớp 10 MÔN TOÁN ĐẠI HỌC SƯ PHẠM THÀNH PHOS HCM năm học 2015 - 2016.</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> </span><a href="https://drive.google.com/file/d/0B1UntQgSATvxUW5oRHFLUFYxUkE/view?usp=sharing" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">DOWNLOAD.</a><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">23. Đề thi vào lớp 10 MÔN TOÁN TỈNH VĨNH PHÚC năm học 2015 - 2016.</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> </span><a href="https://drive.google.com/file/d/0B1UntQgSATvxY0kzRFFuc3NVMEk/view?usp=sharing" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">DOWNLOAD.</a><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">24. Đề thi vào lớp 10 MÔN TOÁN CHUYÊN TỈNH BẠC LIÊU năm học 2015 - 2016.</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> </span><a href="https://drive.google.com/file/d/0B1UntQgSATvxR0cxcTd3YTZUUW8/view?usp=sharing" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">DOWNLOAD.</a><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">25. Đề thi vào lớp 10 MÔN TOÁN CHUYÊN LAM SƠN THANH HÓA năm học 2015 - 2016.</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> </span><a href="https://drive.google.com/file/d/0B1UntQgSATvxMHRldE00cEpzaTQ/view?usp=sharing" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">DOWNLOAD.</a><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">26. Đề thi vào lớp 10 MÔN TOÁN TỈNH HẢI DƯƠNG năm học 2015 - 2016.</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> </span><a href="https://drive.google.com/file/d/0B1UntQgSATvxdVNKRVBBXzJOQWs/view?usp=sharing" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">DOWNLOAD.</a><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">27. Đề thi vào lớp 10 MÔN TOÁN PHỔ THONG NĂNG KHIẾU (KHÔNG CHUYÊN) năm học 2015 - 2016.</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"></span><a href="https://drive.google.com/file/d/0B1UntQgSATvxV09ZWEFkSnIybU0/view?usp=sharing" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">DOWNLOAD.</a><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">28. Đề thi vào lớp 10 MÔN TOÁN TỈNH THÙA THIÊN HUẾ năm học 2015 - 2016.</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> </span><a href="https://drive.google.com/file/d/0B1UntQgSATvxeW5NdzFKRGZqV28/view?usp=sharing" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">DOWNLOAD.</a><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">29. Đề thi vào lớp 10 MÔN TOÁN CHUYÊN LONG AN năm học 2015 - 2016.</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> </span><a href="https://drive.google.com/file/d/0B1UntQgSATvxTFpFRUh3dUtBLW8/view?usp=sharing" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">DOWNLOAD.</a><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">30. Đề thi vào lớp 10 MÔN TOÁN TỈNH BẮC GIANG năm học 2015 - 2016.</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> </span><a href="https://drive.google.com/file/d/0B1UntQgSATvxeEFOMVotRnlnbTg/view?usp=sharing" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">DOWNLOAD.</a><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">31. Đề thi vào lớp 10 MÔN TOÁN TỈNH NGHỆ AN năm học 2015 - 2016.</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> </span><a href="https://drive.google.com/file/d/0B1UntQgSATvxMmd0MmExd1JTVGs/view?usp=sharing" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">DOWNLOAD.</a><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">32. Đề thi vào lớp 10 MÔN TOÁN THÀNH PHỐ HẢI PHÒNG năm học 2015 - 2016.</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> </span><a href="https://www.facebook.com/vnmath/photos/pcb.1100648786619139/1100648483285836/?type=1&theater" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">DOWNLOAD.</a><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">33. Đề thi vào lớp 10 MÔN TOÁN TỈNH TRÀ VINH năm học 2015 - 2016.</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> </span><a href="https://drive.google.com/file/d/0B1UntQgSATvxNzktMXJiSlhycWM/view?usp=sharing" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">DOWNLOAD.</a><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">34. Đề thi vào lớp 10 MÔN TOÁN THÀNH PHỐ HÀ NỘI năm học 2015 - 2016.</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> </span><a href="https://drive.google.com/file/d/0B1UntQgSATvxWGp3TF9CZ1FUeTQ/view?usp=sharing" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">DOWNLOAD.</a><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">35. Đề thi vào lớp 10 MÔN TOÁN CHUYÊN HÀ NỘI - AMSTERDAM năm học 2015 - 2016.</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> </span><br /><div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiYHmbHCBwJaIFGnVFz9uVHqjkyveNQ1Qgaz5bgKjFya-X3yYL6wOBmy_n_UJGVkWGcKueAVkoC0wOoJ6-giCBuV4_SRltWnT12Lia6LOI9WTXPDpVzTsTjp7_VjI1K5BpXI2EyYRnmRxVx/s1600/detoanchuyen-1434107619_660x0.jpg" imageanchor="1" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; border: 0px; color: #00e6ff; font-weight: bold; margin: 0px 1em; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiYHmbHCBwJaIFGnVFz9uVHqjkyveNQ1Qgaz5bgKjFya-X3yYL6wOBmy_n_UJGVkWGcKueAVkoC0wOoJ6-giCBuV4_SRltWnT12Lia6LOI9WTXPDpVzTsTjp7_VjI1K5BpXI2EyYRnmRxVx/s640/detoanchuyen-1434107619_660x0.jpg" style="border: none; margin: 0px; padding: 0px;" /></a></div><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">36. Đề thi vào lớp 10 MÔN TOÁN TỈNH HƯNG YÊN năm học 2015 - 2016.</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> </span><a href="https://drive.google.com/file/d/0B1UntQgSATvxdzVYV25sUXF0UzQ/view?usp=sharing" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">DOWNLOAD.</a><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">37. Đề thi vào lớp 10 chuyên Quốc Học Huế năm học 2015 - 2016.</b>Unknownnoreply@blogger.comtag:blogger.com,1999:blog-6690046711930903487.post-33727723422099214892015-06-15T20:09:00.000-07:002015-10-15T05:32:38.394-07:00Giải các câu khó trong đề minh họa thi THPT 2015 bằng nhiều cách <div class="single-content">Giải các câu khó trong <a href="http://luyenthidaihocvip.blogspot.com/2015/04/e-thi-mau-ki-thi-thpt-quoc-gia-2015-cua.html" target="_blank">đề minh họa kì thi THPT quốc gia năm 2015 của BGD</a> bằng nhiều cách. Chia sẻ bởi thầy Nguyễn Văn Quí, GV THPT chuyên Bến Tre. <a href="https://drive.google.com/file/d/0B1UntQgSATvxeVg3Q2NHbW1PaGM/view?usp=sharing">Download.</a><br /><br /><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg1RnVqBljUDcxaemKlD7TvlgrGJehlyQyQa_E0qjdRXAG7GqlvJ222W4N5WAXEXyilvx-ZZUKHEATfYuf_8vUg7Bf0vkIp0udROZj_A7BN83o8fFfN8-_cFvi-wkpbVfdZxREwg2F5IbOU/s1600/giai+de+minh+hoa+2015+cua+bo+bang+nhieu+cach.PNG" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg1RnVqBljUDcxaemKlD7TvlgrGJehlyQyQa_E0qjdRXAG7GqlvJ222W4N5WAXEXyilvx-ZZUKHEATfYuf_8vUg7Bf0vkIp0udROZj_A7BN83o8fFfN8-_cFvi-wkpbVfdZxREwg2F5IbOU/s640/giai+de+minh+hoa+2015+cua+bo+bang+nhieu+cach.PNG" /></a></div></div>Unknownnoreply@blogger.comtag:blogger.com,1999:blog-6690046711930903487.post-40370253154933738202015-06-01T20:51:00.000-07:002015-10-15T05:32:38.411-07:00Tuyển tập Đề thi thử THPT Quốc gia môn Toán năm 2015 và Đáp án Dưới đây là Tổng hợp các Đề thi và đáp án thi thử THPT Quốc gia môn Toán năm 2015 của các trường, các Trung tâm luyện thi trên cả nước. Hầu như các đề thi Đại học này đều có đáp án và thang điểm chi tiết.<br /><br />Đề thi cũng như đáp án được cập nhật liên tục. Mời các bạn quay lại liên kết này để xem các đề mới.<br /><img alt="" class="fbPhotoImage" id="fbPhotoImage" src="https://fbcdn-sphotos-e-a.akamaihd.net/hphotos-ak-xap1/t31.0-8/s960x960/10926824_1023852034298815_1961562435896913253_o.png" /> <br /><br /><b>TỔNG HỢP ĐỀ THI ĐẠI HỌC CHÍNH THỨC TỪ 2002 ĐẾN 2014. <a href="https://drive.google.com/file/d/0B1UntQgSATvxX1BzVVNiX2lUaHM/view?usp=sharing">DOWNLOAD.</a></b><br /><br /><b>0. Các đề thi thử của tạp chí Toán học và Tuổi trẻ năm 2015.</b><br /><br /><a href="http://www.fshare.vn/file/T2ZSJ842ST">Đề số 1 (Trần Quốc Luật Hà Tĩnh)</a>. <a href="http://book.vnmath.com/2014/11/dap-de-thi-thu-so-1-toan-hoc-tuoi-tre.html">Đáp án.</a><br /><br /><a href="http://www.mediafire.com/?2lgckde4o2cyrc1">Đề số 2 (Phạm Trọng Thư, Đồng Tháp)</a>. <a href="https://drive.google.com/file/d/0B1UntQgSATvxRUlyOFBUUllGU3M/view?usp=sharing">Đáp án.</a><br /><br /><a href="https://www.facebook.com/vnmath/photos/pb.117970064887021.-2207520000.1422789946./992773320740020/?type=3&theater">Đề số 3 (Nguyễn Tất Thu, Đồng Nai)</a>. <a href="https://drive.google.com/file/d/0B1UntQgSATvxMkQ3UUxkUW9BWjg/view?usp=sharing">Đáp án.</a><br /><br /><a href="https://www.facebook.com/vnmath/photos/pb.117970064887021.-2207520000.1422787420./1019988771351808/?type=1&theater">Đề số 4 (Lê Xuân Đại, Vĩnh Phúc)</a>. <a href="https://drive.google.com/file/d/0B1UntQgSATvxUHI3ZVp5d2QzU0U/view?usp=sharing">Đáp án.</a><br /><br /><a href="https://www.facebook.com/vnmath/photos/a.656615087689180.1073741825.117970064887021/1041988759151809/?type=1&theater" target="_blank">Đề số 5 (Nguyễn Quang Thi, Lâm Đồng).</a> <a href="https://drive.google.com/file/d/0B1UntQgSATvxT0pKdDMwUGhPZlE/view?usp=sharing">Đáp án. <br /></a><br /><a href="https://drive.google.com/file/d/0B1UntQgSATvxT0pKdDMwUGhPZlE/view?usp=sharing"><br /></a> <a href="https://drive.google.com/file/d/0B1UntQgSATvxMnBOZVUwbkJibjA/view?usp=sharing" target="_blank">Đề số 6 (Nguyễn Lái, Phú Yên). Đáp án.</a><br /><br /><b>1.</b> Đề thi thử Đại học môn Toán năm 2015 trường<b> THPT chuyên Lê Hồng Phong, Thành phố Hồ Chí Minh. </b><a href="http://www.vnmath.com/2015/01/e-thi-thu-quoc-gia-thpt-cua-truong.html">Download.</a><br /><br /><b>2.</b> Đề thi thử Đại học môn Toán năm 2015 của <b>Đại học Sư phạm Hà Nội lần 1</b>. <a href="http://www.vnmath.com/2015/01/e-thi-thu-thpt-quoc-gia-lan-1-su-pham.html">Download.</a><br /><br /><b>3. Đề thi thử Đại học môn Toán năm 2015 của Đại học Khoa học Tự nhiên Hà Nội lần 1</b>. <a href="http://www.vnmath.com/2015/01/e-thi-thu-mon-toan-hoa-cua-ai-hoc-khoc.html">Download.</a><br /><br /><b>4.</b> <b>Đề thi THPT Quốc gia môn Toán năm 2015 trường THPT chuyên Quốc Học, Huế lần 1</b>. <a href="http://www.vnmath.com/2015/01/e-thi-thu-tot-nghiep-thpt-lan-1-nam.html" target="_blank">Download.</a><br /><br /><b>5. Đề thi THPT Quốc gia môn Toán năm 2015 Sở Giáo dục Bắc Ninh</b>. <a href="http://www.vnmath.com/2015/01/e-thi-thu-ki-thi-thpt-quoc-gia-tinh-bac.html">Download.</a><br /><br /><b>6.</b> Đề thi THPT Quốc gia môn Toán năm 2015 của <b>THPT chuyên Vĩnh Phúc</b>.<br /> 6.1 <a href="https://drive.google.com/file/d/0B1UntQgSATvxbzBFOTM4bThoT3M/view?usp=sharing" target="_blank">Đề và đáp án lần 1.</a><br /> 6.2 <a href="http://www.vnmath.com/2015/01/e-thi-thpt-quoc-gia-cua-truong-thpt.html" target="_blank">Đề và đáp án lần 2.</a><br /><br /><b>7. </b>Đề thi THPT Quốc gia môn Toán năm 2015 của <b>THPT Nguyễn Trung Thiên, Hà Tĩnh</b>. <a href="http://www.vnmath.com/2015/01/e-thi-thpt-quoc-gia-cua-truong-thpt.html">Download.</a><br /><br /><b>8.</b> Đề thi THPT Quốc gia môn Toán năm 2015 của <b>THPT Đông Sơn 1, Thanh Hóa</b>. <a href="https://drive.google.com/file/d/0B1UntQgSATvxX1dRV3lhSUNNS0k/view?usp=sharing">Download.</a><br /><br /><b>9.</b> Đề thi THPT Quốc gia môn Toán năm 2015 của <b>THPT Hậu Lộc 2, Thanh Hóa</b>. <a href="https://drive.google.com/file/d/0B1UntQgSATvxamVHT1RWNUk3RUU/view?usp=sharing">Download.</a><br /><br /><b>10.</b> Đề thi THPT Quốc gia môn Toán năm 2015 của <b>THPT Đào Duy Từ, Thanh Hóa</b>. <a href="https://drive.google.com/file/d/0B1UntQgSATvxWlZxcjV4cnZtc2M/view?usp=sharing">Download.</a><br /><br /><b>11.</b> Đề thi THPT Quốc gia môn Toán của <b>Sở Giáo dục và Đào tạo Vĩnh Phúc</b> lần 1 năm 2015. <a href="https://drive.google.com/file/d/0B1UntQgSATvxV2phVmw3WVgySlU/view?usp=sharing">Download.</a><br /><br /><b>12.</b> Đề thi THPT Quốc gia môn Toán của <b>THPT Nghi Sơn Thanh Hóa</b> lần 1 năm 2015. <a href="https://drive.google.com/file/d/0B1UntQgSATvxb1NqdDlZMFREUzQ/view?usp=sharing">Download.</a><br /><br /><b>13.</b> Đề thi THPT Quốc gia môn Toán của <a href="https://drive.google.com/file/d/0B1UntQgSATvxbVItV2FLOUtETGc/view?usp=sharing"><b>DVH</b> 2015. Download.</a><br /><br /><b>14.</b> Đề thi THPT Quốc gia môn Toán của <a href="https://drive.google.com/file/d/0B1UntQgSATvxbVItV2FLOUtETGc/view?usp=sharing"><b>THPT Đồng Lộc, Hà Tĩnh</b> lần 1 năm 2015. Download.</a><br /><br /><b>15.</b> Đề thi THPT Quốc gia môn Toán của <a href="https://drive.google.com/file/d/0B1UntQgSATvxM2VlZXlRQ2lIZzQ/view?usp=sharing"><b>THPT Ngô Gia Tự, Bắc Ninh</b> lần 1 năm 2015. Download.</a><br /><br /><b>16.</b> Đề thi THPT Quốc gia môn Toán của <a href="https://drive.google.com/file/d/0B1UntQgSATvxOEVjR1RDRURMNm8/view?usp=sharing"><b>THPT Yên Lạc, Vĩnh Phúc</b> lần 1 năm 2015. Download.</a><br /><br /><b>17. Đáp án Đề thi thử THPT môn Toán của <a href="https://drive.google.com/file/d/0B1UntQgSATvxSXJ2d0RJU3czNFk/view?usp=sharing">Đại học Sư phạm Hà Nội lần 2 năm 2015. Download.</a></b><br /><br />Đề thi lần 2 các môn <a href="http://www.vnmath.com/2015/02/e-thi-thu-lan-2-su-pham-ha-noi-2015.html" target="_blank">Hóa, Lý , Sinh, Tiếng Anh, Ngữ Văn có thể tải về ở đây.</a><br /><br /><b>18. Đáp án Đề thi thử THPT môn Toán của <a href="https://drive.google.com/file/d/0B1UntQgSATvxNGFEcnIwLW9lRmM/view?usp=sharing">trường THPT Đa Phúc, Hà Nội. Download.</a></b><br /><br /><b>19. Đáp án Đề thi thử THPT môn Toán của <a href="https://drive.google.com/file/d/0B1UntQgSATvxczlibzF3NEpRRlk/view?usp=sharing">trường THPT Lý Tự Trọng, Khánh Hòa. Download.</a></b><br /><br /><b>20. Đáp án Đề thi thử THPT môn Toán của <a href="https://drive.google.com/file/d/0B1UntQgSATvxdjluNk9qYmVTNDQ/view?usp=sharing">trường THPT Lương Thế Vinh, Hà Nội. Download.</a></b><br /><br /><b>21. Đáp án Đề thi thử THPT môn Toán của <a href="https://drive.google.com/file/d/0B1UntQgSATvxTGlybHgtdjllUVk/view?usp=sharing">trường THPT Nông Cống 1, Thanh Hóa. Download.</a></b><br /><br /><b>22. Đáp án Đề thi thử THPT môn Toán của <a href="https://drive.google.com/file/d/0B1UntQgSATvxVGlseFJLN2NrSWs/view?usp=sharing">trường THPT chuyên Vĩnh Phúc, Vĩnh Phúc lần 3. Download.</a></b><br /><br /><b>23. Đáp án Đề thi thử THPT môn Toán của <a href="https://drive.google.com/file/d/0B1UntQgSATvxMV9FNWpiSmxpOW8/view?usp=sharing">trường THPT Đồng Thọ, Tuyên Quang. Download.</a></b><br /><br /><b>24. Đáp án Đề thi thử THPT môn Toán của <a href="https://drive.google.com/file/d/0B1UntQgSATvxeVdwSEFVbjBiMU0/view?usp=sharing">trường THPT chuyên Hạ Long, Quảng Ninh. Download.</a></b><br /><br /><b>25. Đáp án Đề thi thử THPT môn Toán của <a href="https://drive.google.com/file/d/0B1UntQgSATvxdkV6XzgwS3UzVXM/view?usp=sharing">Bà Rịa Vũng Tàu. Download.</a></b><br /><br /><b>26. Đáp án Đề thi thử THPT môn Toán của <a href="https://drive.google.com/file/d/0B1UntQgSATvxRDhRMlZlWWdTQjQ/view?usp=sharing">THPT chuyên Lam Sơn, Thanh Hóa. Download.</a></b><br /><br /><b>27. Đáp án Đề thi thử THPT môn Toán của <a href="https://drive.google.com/file/d/0B1UntQgSATvxVTJITTd5MXFUVTg/view?usp=sharing">THPT Hồng Quang, Hải Dương. Download.</a></b><br /><br /><b>28. Đáp án Đề thi thử THPT môn Toán của <a href="https://drive.google.com/file/d/0B1UntQgSATvxX1ZTS0I0eUI1dEE/view?usp=sharing">THPT Nghèn, Hà Tĩnh. Download.</a></b><br /><br /><b>29. Đáp án Đề thi thử THPT môn Toán của <a href="https://drive.google.com/file/d/0B1UntQgSATvxRU9SaTIzeDJ2b1U/view?usp=sharing">THPT Cẩm Bình, Hà Tĩnh. Download.</a></b><br /><br /><b>30. Đáp án Đề thi thử THPT môn Toán của <a href="https://drive.google.com/file/d/0B1UntQgSATvxR0tfalE5UkhWTFU/view?usp=sharing">THPT chuyên Nguyễn Quang Diêu, Đồng Tháp lần 1. Download.</a></b><br /><br /><b>31. Đáp án Đề thi thử THPT môn Toán của <a href="https://drive.google.com/file/d/0B1UntQgSATvxc0l0UnNUWGstcEU/view?usp=sharing">THPT Quỳnh Lưu 1, Thanh Hóa. Download.</a></b><br /><br /><b>32. Đáp án Đề thi thử THPT môn Toán của <a href="https://drive.google.com/file/d/0B1UntQgSATvxZU5tVy1oYThsdjg/view?usp=sharing">THPT Hậu Lộc 2, Thanh Hóa. Download.</a></b><br /><br /><b>33. Đáp án Đề thi thử THPT môn Toán của <a href="https://drive.google.com/file/d/0B1UntQgSATvxWEhOa282NVNnVUU/view?usp=sharing">THPT Triệu SƠn 5, Thanh Hóa. Download.</a></b><br /><br /><b>34. Đáp án Đề thi thử THPT môn Toán của <a href="https://drive.google.com/file/d/0B1UntQgSATvxNi1Tdzh5VVFFX0U/view?usp=sharing">THPT Nông Cống 1, Thanh Hóa. Download.</a></b><br /><br /><b>35. Đáp án Đề thi thử THPT môn Toán của <a href="https://drive.google.com/file/d/0B1UntQgSATvxbDYyWEJIRktGLVE/view?usp=sharing">THPT Lê Xoay, Vĩnh Phúc. Download.</a></b>Unknownnoreply@blogger.comtag:blogger.com,1999:blog-6690046711930903487.post-33888252478681894492015-05-08T23:12:00.000-07:002015-10-15T05:32:38.445-07:00Đáp án và Bình luận Đề thi Đại học môn Toán khối B, D năm 2014<div style="background-color: white; border: 0px; color: #666666; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin-bottom: 5px; padding: 5px 0px;"><br /></div><div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgTpICzbT4j-Y2ef0Z6HIyROori2H8MleoPyJ3DVBnBIQC5X6qmfVzRbVPGk0GERxYS-ykCMlo9M5yXbZ-ntXjpnEM6VCMBDzayxfDE8dYkoJiwp6gZUpbJgOvxENrfLRT7tBGlnQ6vgobE/s1600/De_toan_khoi_B.jpg" imageanchor="1" style="-webkit-transition: color 0.25s linear; border: 0px; color: #444444; font-weight: bold; margin: 0px 1em; padding: 0px; text-decoration: none; transition: color 0.25s linear;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgTpICzbT4j-Y2ef0Z6HIyROori2H8MleoPyJ3DVBnBIQC5X6qmfVzRbVPGk0GERxYS-ykCMlo9M5yXbZ-ntXjpnEM6VCMBDzayxfDE8dYkoJiwp6gZUpbJgOvxENrfLRT7tBGlnQ6vgobE/s640/De_toan_khoi_B.jpg" style="border: none; margin: 0px; padding: 0px;" /></a></div><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;">Đề thi Đại học môn Toán khối D năm 2014.</b><br /><div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEidWJtg5pCBtlzYdo82GfKFpykpjo6yq1RTyhjYS8wpQA_Wln6mnswQNEKj39To9OJ1fVv_TscXOdcmUnxAbO55fPWKFa3Z4Wvae1G167lSyhnS7bJr9Jja6duovZ9KuG3dXMVWhTWcFua6/s1600/de+thi+dai+hoc+mon+toan+khoi+d+nam+2014.jpg" imageanchor="1" style="-webkit-transition: color 0.25s linear; border: 0px; color: #444444; font-weight: bold; margin: 0px 1em; padding: 0px; text-decoration: none; transition: color 0.25s linear;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEidWJtg5pCBtlzYdo82GfKFpykpjo6yq1RTyhjYS8wpQA_Wln6mnswQNEKj39To9OJ1fVv_TscXOdcmUnxAbO55fPWKFa3Z4Wvae1G167lSyhnS7bJr9Jja6duovZ9KuG3dXMVWhTWcFua6/s640/de+thi+dai+hoc+mon+toan+khoi+d+nam+2014.jpg" style="border: none; margin: 0px; padding: 0px;" /></a></div><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;"><i style="border: 0px; margin: 0px; padding: 0px;"><br style="margin: 0px; padding: 0px;" /></i></b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;"></span><span style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: medium; margin: 0px; padding: 0px;"><b style="border: 0px; font-size: 18px; margin: 0px; padding: 0px;"><i style="border: 0px; margin: 0px; padding: 0px;">Gợi ý giải Đề thi Đại học </i></b><b style="border: 0px; font-size: 18px; margin: 0px; padding: 0px;"><i style="border: 0px; margin: 0px; padding: 0px;">khối B </i></b><b style="border: 0px; font-size: 18px; margin: 0px; padding: 0px;"><i style="border: 0px; margin: 0px; padding: 0px;">môn Toán năm 2014. <a href="http://book.vnmath.com/2014/07/dap-toan-khoi-b-nam-2014.html" style="-webkit-transition: color 0.25s linear; border: 0px; color: #444444; margin: 0px; padding: 0px; text-decoration: none; transition: color 0.25s linear;">Download file PDF</a></i></b></span><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;"></span><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;"><br style="margin: 0px; padding: 0px;" /></b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;"></span><br /><div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjQoDD-kukViO2kvW6RkHKzYdWvN2-1qQW_X4qz6SYxKftRdqp-WxF1qgvzcdw6uFPDk5PRsObHsPQwOEMJNTUQv1Z3fm8yI9jRzSD4pf0iEbNGOPVGkc9kTyREDshx14qYgQbRwMOcZ1ZE/s1600/dap+an+toan+B+2014+1.PNG" imageanchor="1" style="-webkit-transition: color 0.25s linear; border: 0px; color: #444444; font-weight: bold; margin: 0px 1em; padding: 0px; text-decoration: none; transition: color 0.25s linear;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjQoDD-kukViO2kvW6RkHKzYdWvN2-1qQW_X4qz6SYxKftRdqp-WxF1qgvzcdw6uFPDk5PRsObHsPQwOEMJNTUQv1Z3fm8yI9jRzSD4pf0iEbNGOPVGkc9kTyREDshx14qYgQbRwMOcZ1ZE/s640/dap+an+toan+B+2014+1.PNG" style="border: none; margin: 0px; padding: 0px;" /></a></div><div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgRBGlFqc8HAxXmetbXjjGhUNzceywJgEQXAZde626ShhYHEtA-lpZfKTm15gjBRTm4QiNGPRxxYoA4kdc1AZCn6XEWLbOO8z2DRt0ZSXGKTuK7d1lw6-cWIMRcdOtMxQM5zLdj3uWJg0z2/s1600/dap+an+toan+B+2014+2.PNG" imageanchor="1" style="-webkit-transition: color 0.25s linear; border: 0px; color: #444444; font-weight: bold; margin: 0px 1em; padding: 0px; text-decoration: none; transition: color 0.25s linear;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgRBGlFqc8HAxXmetbXjjGhUNzceywJgEQXAZde626ShhYHEtA-lpZfKTm15gjBRTm4QiNGPRxxYoA4kdc1AZCn6XEWLbOO8z2DRt0ZSXGKTuK7d1lw6-cWIMRcdOtMxQM5zLdj3uWJg0z2/s640/dap+an+toan+B+2014+2.PNG" style="border: none; margin: 0px; padding: 0px;" /></a></div><div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEihjs46Ez4OhuDW24awpMthVebzOWP26Fey7WZlSr_arn7NyH0ROoeA8zX9RO3c2zjxa-LEfJerGLXK9b3_In2DLFwCy-DeNGyZgDlsjDI_oy2NZHg2ilwwtlJDqETbjRsuaa1KE46cpE7S/s1600/dap+an+toan+B+2014+3.PNG" imageanchor="1" style="-webkit-transition: color 0.25s linear; border: 0px; color: #444444; font-weight: bold; margin: 0px 1em; padding: 0px; text-decoration: none; transition: color 0.25s linear;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEihjs46Ez4OhuDW24awpMthVebzOWP26Fey7WZlSr_arn7NyH0ROoeA8zX9RO3c2zjxa-LEfJerGLXK9b3_In2DLFwCy-DeNGyZgDlsjDI_oy2NZHg2ilwwtlJDqETbjRsuaa1KE46cpE7S/s640/dap+an+toan+B+2014+3.PNG" style="border: none; margin: 0px; padding: 0px;" /></a></div><div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjd7gHlm8S_14YQ9_s3LkiGVA8VTpnhJ7pbd3xyRX7GkENT3_1-VZYS8lmag8ID4SlpyBKD1vLEcvRToojYdA1tSr66QYkIqNq3BLWrH69ZrrTGVgz7dRFU_3Xc0cySesGN_GEAgYXD3JaN/s1600/dap+an+toan+B+2014+4.PNG" imageanchor="1" style="-webkit-transition: color 0.25s linear; border: 0px; color: #444444; font-weight: bold; margin: 0px 1em; padding: 0px; text-decoration: none; transition: color 0.25s linear;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjd7gHlm8S_14YQ9_s3LkiGVA8VTpnhJ7pbd3xyRX7GkENT3_1-VZYS8lmag8ID4SlpyBKD1vLEcvRToojYdA1tSr66QYkIqNq3BLWrH69ZrrTGVgz7dRFU_3Xc0cySesGN_GEAgYXD3JaN/s640/dap+an+toan+B+2014+4.PNG" style="border: none; margin: 0px; padding: 0px;" /></a></div><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;">Câu 1.</span><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;" /><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;">Câu 2.</span><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;" /><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;">Câu 3. Đáp số: </span><span class="MathJax_Preview" style="background-color: white; border: 0px; color: #888888; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-4-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><nobr style="-webkit-transition: none; border: 0px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; transition: none; vertical-align: 0px;"><span class="math" id="MathJax-Span-25" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 4.386em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 3.213em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.41em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-26" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-27" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">1</span><span class="mo" id="MathJax-Span-28" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+</span><span class="mi" id="MathJax-Span-29" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">ln</span><span class="mo" id="MathJax-Span-30" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"></span><span class="mn" id="MathJax-Span-31" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.188em; position: static; transition: none; vertical-align: 0px;">3</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.254em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.163em; width: 0px;"></span></span></nobr></span><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;">.</span><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;" /><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;">Câu 4.</span><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;" /><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;">Câu 5.</span><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;" /><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;">Câu 6.</span><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;" /><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;">Câu 7.</span><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;" /><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;">Câu 8. Từ phương trình thứ nhất suy ra </span><span class="MathJax_Preview" style="background-color: white; border: 0px; color: #888888; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-5-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><nobr style="-webkit-transition: none; border: 0px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; transition: none; vertical-align: 0px;"><span class="math" id="MathJax-Span-32" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 3.275em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 2.41em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.534em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-33" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-34" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">y<span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0.003em;"></span></span><span class="mo" id="MathJax-Span-35" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">=</span><span class="mn" id="MathJax-Span-36" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">1</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.338em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.329em; width: 0px;"></span></span></nobr></span><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;"> hoặc </span><span class="MathJax_Preview" style="background-color: white; border: 0px; color: #888888; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-6-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><nobr style="-webkit-transition: none; border: 0px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; transition: none; vertical-align: 0px;"><span class="math" id="MathJax-Span-37" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 5.682em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 4.201em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.534em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-38" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-39" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">x</span><span class="mo" id="MathJax-Span-40" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">=</span><span class="mi" id="MathJax-Span-41" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">y<span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0.003em;"></span></span><span class="mo" id="MathJax-Span-42" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+</span><span class="mn" id="MathJax-Span-43" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">1</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.338em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.329em; width: 0px;"></span></span></nobr></span><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;">. Đáp số: </span><span class="MathJax_Preview" style="background-color: white; border: 0px; color: #888888; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-7-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><nobr style="-webkit-transition: none; border: 0px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; transition: none; vertical-align: 0px;"><span class="math" id="MathJax-Span-44" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 2.966em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 2.164em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.238em 1000.003em 2.596em -0.429em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-45" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mo" id="MathJax-Span-46" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">(</span><span class="mn" id="MathJax-Span-47" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">3</span><span class="mo" id="MathJax-Span-48" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">,</span><span class="mn" id="MathJax-Span-49" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.188em; position: static; transition: none; vertical-align: 0px;">1</span><span class="mo" id="MathJax-Span-50" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">)</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.504em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.413em; width: 0px;"></span></span></nobr></span><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;"> và </span><span class="MathJax_Preview" style="background-color: white; border: 0px; color: #888888; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-8-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><nobr style="-webkit-transition: none; border: 0px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; transition: none; vertical-align: 0px;"><span class="math" id="MathJax-Span-51" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 8.83em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 6.546em;"><span style="-webkit-transition: none; border: 0px; clip: rect(0.867em 1000.003em 2.719em -0.429em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-52" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mo" id="MathJax-Span-53" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">(</span><span class="mfrac" id="MathJax-Span-54" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 0px; margin: 0px 0.127em; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 2.04em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.423em 1000.003em 2.472em -0.491em); left: 16.515625px; margin: 0px 0px 0px -0.923em; padding: 0px; position: absolute; top: -2.713em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-55" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-56" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">1</span><span class="mo" id="MathJax-Span-57" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">+</span><span class="msqrt" id="MathJax-Span-58" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 0.929em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.485em 1000.003em 2.349em -0.491em); left: 0.559em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-59" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-60" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">5</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(0.867em 1000.003em 1.299em -0.552em); left: 0.559em; margin: 0px; padding: 0px; position: absolute; top: -1.602em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.373em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.059em; width: 0px;"></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1.052em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(3.275em 1000.003em 4.324em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -4.009em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">√</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 4.015em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span></span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(1.485em 1000.003em 2.349em -0.491em); left: 16.515625px; margin: 0px 0px 0px -0.182em; padding: 0px; position: absolute; top: -1.787em; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-61" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">2</span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(0.806em 1000.003em 1.238em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -1.293em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 2.04em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0.003em; width: 0px;"></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1.052em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="mo" id="MathJax-Span-62" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.188em; position: static; transition: none; vertical-align: 0px;">,</span><span class="mfrac" id="MathJax-Span-63" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.188em; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 0px; margin: 0px 0.127em; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 2.596em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.423em 1000.003em 2.472em -0.491em); left: 21.015625px; margin: 0px 0px 0px -1.231em; padding: 0px; position: absolute; top: -2.713em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-64" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mo" id="MathJax-Span-65" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">−</span><span class="mn" id="MathJax-Span-66" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">1</span><span class="mo" id="MathJax-Span-67" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">+</span><span class="msqrt" id="MathJax-Span-68" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 0.929em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.485em 1000.003em 2.349em -0.491em); left: 0.559em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-69" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-70" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">5</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(0.867em 1000.003em 1.299em -0.552em); left: 0.559em; margin: 0px; padding: 0px; position: absolute; top: -1.602em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.373em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.059em; width: 0px;"></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1.052em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(3.275em 1000.003em 4.324em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -4.009em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">√</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 4.015em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span></span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(1.485em 1000.003em 2.349em -0.491em); left: 21.015625px; margin: 0px 0px 0px -0.182em; padding: 0px; position: absolute; top: -1.787em; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-71" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">2</span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(0.806em 1000.003em 1.238em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -1.293em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 2.596em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0.003em; width: 0px;"></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1.052em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="mo" id="MathJax-Span-72" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">)</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 2.254em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.579em; width: 0px;"></span></span></nobr></span><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;">.</span><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;" /><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;">Câu 9. Từ </span><span class="MathJax_Preview" style="background-color: white; border: 0px; color: #888888; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-9-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><nobr style="-webkit-transition: none; border: 0px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; transition: none; vertical-align: 0px;"><span class="math" id="MathJax-Span-73" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 8.707em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 6.423em;"><span style="-webkit-transition: none; border: 0px; clip: rect(0.929em 1000.003em 3.09em -0.429em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-74" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="msqrt" id="MathJax-Span-75" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 2.534em;"><span style="-webkit-transition: none; border: 0px; clip: rect(3.09em 1000.003em 4.694em -0.552em); left: 0.991em; margin: 0px; padding: 0px; position: absolute; top: -4.009em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-76" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mfrac" id="MathJax-Span-77" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 0px; margin: 0px 0.127em; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 1.299em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.67em 1000.003em 2.349em -0.552em); left: 10.515625px; margin: 0px 0px 0px -0.182em; padding: 0px; position: absolute; top: -2.59em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-78" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">a</span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(1.485em 1000.003em 2.41em -0.552em); left: 10.515625px; margin: 0px 0px 0px -0.552em; padding: 0px; position: absolute; top: -1.725em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-79" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-80" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">b</span><span class="mo" id="MathJax-Span-81" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">+</span><span class="mi" id="MathJax-Span-82" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">c</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(0.806em 1000.003em 1.238em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -1.293em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 1.299em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0.003em; width: 0px;"></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1.052em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span></span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 4.015em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(3.583em 1000.003em 4.077em -0.552em); left: 0.991em; margin: 0px; padding: 0px; position: absolute; top: -4.75em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 1.546em;"><span style="-webkit-transition: none; border: 0px; font-family: MathJax_Main; left: -0.059em; margin: 0px; padding: 0px; position: absolute; top: -4.009em; transition: none; vertical-align: 0px;">−<span style="-webkit-transition: none; border: 0px; display: inline-block; height: 4.015em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; font-family: MathJax_Main; left: 0.867em; margin: 0px; padding: 0px; position: absolute; top: -4.009em; transition: none; vertical-align: 0px;">−<span style="-webkit-transition: none; border: 0px; display: inline-block; height: 4.015em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; font-family: MathJax_Main; left: 0.373em; margin: 0px; padding: 0px; position: absolute; top: -4.009em; transition: none; vertical-align: 0px;">−<span style="-webkit-transition: none; border: 0px; display: inline-block; height: 4.015em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 4.015em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(2.657em 1000.003em 4.88em -0.429em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -3.886em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; font-family: MathJax_Size2; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">√</span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 4.015em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="mo" id="MathJax-Span-83" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">≥</span><span class="mfrac" id="MathJax-Span-84" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 0px; margin: 0px 0.127em; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 2.225em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.485em 1000.003em 2.349em -0.491em); left: 18.015625px; margin: 0px 0px 0px -0.367em; padding: 0px; position: absolute; top: -2.59em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-85" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-86" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">2</span><span class="mi" id="MathJax-Span-87" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">a</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(1.485em 1000.003em 2.41em -0.552em); left: 18.015625px; margin: 0px 0px 0px -1.046em; padding: 0px; position: absolute; top: -1.725em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-88" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-89" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">a</span><span class="mo" id="MathJax-Span-90" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">+</span><span class="mi" id="MathJax-Span-91" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">b</span><span class="mo" id="MathJax-Span-92" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">+</span><span class="mi" id="MathJax-Span-93" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">c</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(0.806em 1000.003em 1.238em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -1.293em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 2.225em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0.003em; width: 0px;"></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1.052em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span></span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 2.587em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -1.079em; width: 0px;"></span></span></nobr></span><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;"> và </span><span class="MathJax_Preview" style="background-color: white; border: 0px; color: #888888; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-10-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><nobr style="-webkit-transition: none; border: 0px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; transition: none; vertical-align: 0px;"><span class="math" id="MathJax-Span-94" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 8.769em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 6.485em;"><span style="-webkit-transition: none; border: 0px; clip: rect(0.806em 1000.003em 2.966em -0.429em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-95" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="msqrt" id="MathJax-Span-96" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 2.596em;"><span style="-webkit-transition: none; border: 0px; clip: rect(2.904em 1000.003em 4.633em -0.552em); left: 0.991em; margin: 0px; padding: 0px; position: absolute; top: -4.009em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-97" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mfrac" id="MathJax-Span-98" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 0px; margin: 0px 0.127em; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 1.361em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.485em 1000.003em 2.349em -0.552em); left: 11.015625px; margin: 0px 0px 0px -0.12em; padding: 0px; position: absolute; top: -2.59em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-99" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">b</span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(1.546em 1000.003em 2.41em -0.552em); left: 11.015625px; margin: 0px 0px 0px -0.614em; padding: 0px; position: absolute; top: -1.787em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-100" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-101" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">a</span><span class="mo" id="MathJax-Span-102" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">+</span><span class="mi" id="MathJax-Span-103" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">c</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(0.806em 1000.003em 1.238em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -1.293em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 1.361em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0.003em; width: 0px;"></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1.052em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span></span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 4.015em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(3.583em 1000.003em 4.077em -0.552em); left: 0.991em; margin: 0px; padding: 0px; position: absolute; top: -4.873em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 1.608em;"><span style="-webkit-transition: none; border: 0px; font-family: MathJax_Main; left: -0.059em; margin: 0px; padding: 0px; position: absolute; top: -4.009em; transition: none; vertical-align: 0px;">−<span style="-webkit-transition: none; border: 0px; display: inline-block; height: 4.015em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; font-family: MathJax_Main; left: 0.929em; margin: 0px; padding: 0px; position: absolute; top: -4.009em; transition: none; vertical-align: 0px;">−<span style="-webkit-transition: none; border: 0px; display: inline-block; height: 4.015em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; font-family: MathJax_Main; left: 0.435em; margin: 0px; padding: 0px; position: absolute; top: -4.009em; transition: none; vertical-align: 0px;">−<span style="-webkit-transition: none; border: 0px; display: inline-block; height: 4.015em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 4.015em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(2.657em 1000.003em 4.88em -0.429em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -4.009em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; font-family: MathJax_Size2; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">√</span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 4.015em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="mo" id="MathJax-Span-104" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">≥</span><span class="mfrac" id="MathJax-Span-105" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 0px; margin: 0px 0.127em; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 2.225em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.485em 1000.003em 2.349em -0.491em); left: 18.015625px; margin: 0px 0px 0px -0.306em; padding: 0px; position: absolute; top: -2.59em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-106" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-107" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">2</span><span class="mi" id="MathJax-Span-108" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">b</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(1.485em 1000.003em 2.41em -0.552em); left: 18.015625px; margin: 0px 0px 0px -1.046em; padding: 0px; position: absolute; top: -1.725em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-109" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-110" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">a</span><span class="mo" id="MathJax-Span-111" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">+</span><span class="mi" id="MathJax-Span-112" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">b</span><span class="mo" id="MathJax-Span-113" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">+</span><span class="mi" id="MathJax-Span-114" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">c</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(0.806em 1000.003em 1.238em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -1.293em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 2.225em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0.003em; width: 0px;"></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1.052em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span></span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 2.587em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.912em; width: 0px;"></span></span></nobr></span><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;"> ta có</span><span class="MathJax_Preview" style="background-color: white; border: 0px; color: #888888; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;"></span><br /><div aria-readonly="true" class="MathJax_Display" role="textbox" style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 1em 0em; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; position: relative; text-align: center; width: 620px;"><span class="MathJax" id="MathJax-Element-11-Frame" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; text-align: left; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="-webkit-transition: none; border: 0px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; transition: none; vertical-align: 0px;"><span class="math" id="MathJax-Span-115" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 23.275em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 17.225em;"><span style="-webkit-transition: none; border: 0px; clip: rect(0.62em 1000.003em 3.336em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-116" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-117" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">P<span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0.127em;"></span></span><span class="mo" id="MathJax-Span-118" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">≥</span><span class="mfrac" id="MathJax-Span-119" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 0px; margin: 0px 0.127em; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 3.954em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.491em); left: 32.015625px; margin: 0px 0px 0px -0.491em; padding: 0px; position: absolute; top: -2.836em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-120" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-121" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">2</span><span class="mi" id="MathJax-Span-122" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">a</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.41em -0.491em); left: 32.015625px; margin: 0px 0px 0px -1.91em; padding: 0px; position: absolute; top: -1.478em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-123" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-124" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">a</span><span class="mo" id="MathJax-Span-125" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+</span><span class="mi" id="MathJax-Span-126" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">b</span><span class="mo" id="MathJax-Span-127" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+</span><span class="mi" id="MathJax-Span-128" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">c</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(0.806em 1000.003em 1.238em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -1.293em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 3.954em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0.003em; width: 0px;"></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1.052em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="mo" id="MathJax-Span-129" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+</span><span class="mfrac" id="MathJax-Span-130" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 0px; margin: 0px 0.127em; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 3.954em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.491em); left: 32.015625px; margin: 0px 0px 0px -0.429em; padding: 0px; position: absolute; top: -2.836em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-131" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-132" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">2</span><span class="mi" id="MathJax-Span-133" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">b</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.41em -0.491em); left: 32.015625px; margin: 0px 0px 0px -1.91em; padding: 0px; position: absolute; top: -1.478em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-134" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-135" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">a</span><span class="mo" id="MathJax-Span-136" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+</span><span class="mi" id="MathJax-Span-137" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">b</span><span class="mo" id="MathJax-Span-138" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+</span><span class="mi" id="MathJax-Span-139" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">c</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(0.806em 1000.003em 1.238em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -1.293em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 3.954em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0.003em; width: 0px;"></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1.052em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="mo" id="MathJax-Span-140" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+</span><span class="mfrac" id="MathJax-Span-141" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 0px; margin: 0px 0.127em; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 3.522em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.546em 1000.003em 2.349em -0.491em); left: 28.515625px; margin: 0px 0px 0px -0.182em; padding: 0px; position: absolute; top: -2.836em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-142" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">c</span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(1.238em 1000.003em 2.596em -0.491em); left: 28.515625px; margin: 0px 0px 0px -1.664em; padding: 0px; position: absolute; top: -1.417em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-143" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-144" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">2</span><span class="mo" id="MathJax-Span-145" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">(</span><span class="mi" id="MathJax-Span-146" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">a</span><span class="mo" id="MathJax-Span-147" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+</span><span class="mi" id="MathJax-Span-148" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">b</span><span class="mo" id="MathJax-Span-149" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">)</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(0.806em 1000.003em 1.238em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -1.293em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 3.522em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0.003em; width: 0px;"></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1.052em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="mo" id="MathJax-Span-150" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.188em; position: static; transition: none; vertical-align: 0px;">.</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 3.337em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -1.412em; width: 0px;"></span></span></nobr></span></div><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;" /><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;">Đặt </span><span class="MathJax_Preview" style="background-color: white; border: 0px; color: #888888; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-12-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><nobr style="-webkit-transition: none; border: 0px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; transition: none; vertical-align: 0px;"><span class="math" id="MathJax-Span-151" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 4.88em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 3.583em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.238em 1000.003em 2.843em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-152" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-153" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">x</span><span class="mo" id="MathJax-Span-154" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">=</span><span class="mfrac" id="MathJax-Span-155" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 0px; margin: 0px 0.127em; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 1.361em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.67em 1000.003em 2.349em -0.552em); left: 11.015625px; margin: 0px 0px 0px -0.12em; padding: 0px; position: absolute; top: -2.59em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-156" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">c</span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(1.485em 1000.003em 2.41em -0.552em); left: 11.015625px; margin: 0px 0px 0px -0.614em; padding: 0px; position: absolute; top: -1.725em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-157" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-158" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">a</span><span class="mo" id="MathJax-Span-159" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">+</span><span class="mi" id="MathJax-Span-160" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">b</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(0.806em 1000.003em 1.238em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -1.293em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 1.361em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0.003em; width: 0px;"></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1.052em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span></span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.838em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.746em; width: 0px;"></span></span></nobr></span><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;">. Khi đó</span><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;" /><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;"></span><span class="MathJax_Preview" style="background-color: white; border: 0px; color: #888888; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;"></span><br /><div aria-readonly="true" class="MathJax_Display" role="textbox" style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 1em 0em; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; position: relative; text-align: center; width: 620px;"><span class="MathJax" id="MathJax-Element-13-Frame" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; text-align: left; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="-webkit-transition: none; border: 0px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; transition: none; vertical-align: 0px;"><span class="math" id="MathJax-Span-161" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 22.966em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 16.978em;"><span style="-webkit-transition: none; border: 0px; clip: rect(0.312em 1000.003em 3.336em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-162" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-163" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">P<span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0.127em;"></span></span><span class="mo" id="MathJax-Span-164" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">≥</span><span class="mfrac" id="MathJax-Span-165" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 0px; margin: 0px 0.127em; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 2.41em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.491em); left: 19.515625px; margin: 0px 0px 0px -0.244em; padding: 0px; position: absolute; top: -2.836em; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-166" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">2</span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.41em -0.491em); left: 19.515625px; margin: 0px 0px 0px -1.108em; padding: 0px; position: absolute; top: -1.478em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-167" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-168" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">x</span><span class="mo" id="MathJax-Span-169" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+</span><span class="mn" id="MathJax-Span-170" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">1</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(0.806em 1000.003em 1.238em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -1.293em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 2.41em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0.003em; width: 0px;"></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1.052em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="mo" id="MathJax-Span-171" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+</span><span class="mfrac" id="MathJax-Span-172" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 0px; margin: 0px 0.127em; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 0.682em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.546em 1000.003em 2.349em -0.491em); left: 5.515625px; margin: 0px 0px 0px -0.244em; padding: 0px; position: absolute; top: -2.836em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-173" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">x</span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.491em); left: 5.515625px; margin: 0px 0px 0px -0.244em; padding: 0px; position: absolute; top: -1.478em; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-174" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">2</span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(0.806em 1000.003em 1.238em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -1.293em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.682em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0.003em; width: 0px;"></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1.052em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="mo" id="MathJax-Span-175" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">=</span><span class="mfrac" id="MathJax-Span-176" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 0px; margin: 0px 0.127em; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 3.645em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.052em 1000.003em 2.596em -0.429em); left: 29.515625px; margin: 0px 0px 0px -1.725em; padding: 0px; position: absolute; top: -2.898em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-177" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mo" id="MathJax-Span-178" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">(</span><span class="mi" id="MathJax-Span-179" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">x</span><span class="mo" id="MathJax-Span-180" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">−</span><span class="mn" id="MathJax-Span-181" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">1</span><span class="msubsup" id="MathJax-Span-182" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 0.806em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.238em 1000.003em 2.596em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mo" id="MathJax-Span-183" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">)</span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; left: 0.373em; margin: 0px; padding: 0px; position: absolute; top: -2.651em; transition: none; vertical-align: 0px;"><span class="texatom" id="MathJax-Span-184" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-185" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-186" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">2</span></span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span></span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(1.238em 1000.003em 2.596em -0.491em); left: 29.515625px; margin: 0px 0px 0px -1.725em; padding: 0px; position: absolute; top: -1.417em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-187" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-188" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">2</span><span class="mo" id="MathJax-Span-189" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">(</span><span class="mi" id="MathJax-Span-190" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">x</span><span class="mo" id="MathJax-Span-191" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+</span><span class="mn" id="MathJax-Span-192" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">1</span><span class="mo" id="MathJax-Span-193" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">)</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(0.806em 1000.003em 1.238em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -1.293em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 3.645em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0.003em; width: 0px;"></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1.052em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="mo" id="MathJax-Span-194" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+</span><span class="mfrac" id="MathJax-Span-195" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 0px; margin: 0px 0.127em; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 0.62em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.491em); left: 5.015625px; margin: 0px 0px 0px -0.244em; padding: 0px; position: absolute; top: -2.836em; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-196" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">3</span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.491em); left: 5.015625px; margin: 0px 0px 0px -0.244em; padding: 0px; position: absolute; top: -1.478em; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-197" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">2</span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(0.806em 1000.003em 1.238em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -1.293em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.62em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0.003em; width: 0px;"></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1.052em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="mo" id="MathJax-Span-198" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">≥</span><span class="mfrac" id="MathJax-Span-199" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 0px; margin: 0px 0.127em; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 0.62em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.491em); left: 5.015625px; margin: 0px 0px 0px -0.244em; padding: 0px; position: absolute; top: -2.836em; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-200" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">3</span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.491em); left: 5.015625px; margin: 0px 0px 0px -0.244em; padding: 0px; position: absolute; top: -1.478em; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-201" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">2</span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(0.806em 1000.003em 1.238em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -1.293em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.62em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0.003em; width: 0px;"></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1.052em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="mo" id="MathJax-Span-202" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.188em; position: static; transition: none; vertical-align: 0px;">.</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 3.837em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -1.412em; width: 0px;"></span></span></nobr></span></div><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;" /><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;">Giá trị nhỏ nhất của </span><span class="MathJax_Preview" style="background-color: white; border: 0px; color: #888888; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-14-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><nobr style="-webkit-transition: none; border: 0px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; transition: none; vertical-align: 0px;"><span class="math" id="MathJax-Span-203" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 1.114em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 0.806em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-204" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-205" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">P<span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0.127em;"></span></span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.088em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.079em; width: 0px;"></span></span></nobr></span><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;"> bằng </span><span class="MathJax_Preview" style="background-color: white; border: 0px; color: #888888; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-15-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><nobr style="-webkit-transition: none; border: 0px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; transition: none; vertical-align: 0px;"><span class="math" id="MathJax-Span-206" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 1.114em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 0.806em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.052em 1000.003em 2.719em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-207" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mfrac" id="MathJax-Span-208" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 0px; margin: 0px 0.127em; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 0.497em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.485em 1000.003em 2.349em -0.552em); left: 4.015625px; margin: 0px 0px 0px -0.182em; padding: 0px; position: absolute; top: -2.59em; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-209" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">3</span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(1.485em 1000.003em 2.349em -0.491em); left: 4.015625px; margin: 0px 0px 0px -0.182em; padding: 0px; position: absolute; top: -1.787em; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-210" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">2</span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(0.806em 1000.003em 1.238em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -1.293em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.497em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0.003em; width: 0px;"></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1.052em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span></span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.921em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.579em; width: 0px;"></span></span></nobr></span><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;"> khi </span><span class="MathJax_Preview" style="background-color: white; border: 0px; color: #888888; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-16-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><nobr style="-webkit-transition: none; border: 0px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; transition: none; vertical-align: 0px;"><span class="math" id="MathJax-Span-211" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 6.793em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 5.003em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.534em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-212" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-213" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">b</span><span class="mo" id="MathJax-Span-214" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">=</span><span class="mi" id="MathJax-Span-215" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">c</span><span class="mo" id="MathJax-Span-216" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">,</span><span class="mi" id="MathJax-Span-217" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.188em; position: static; transition: none; vertical-align: 0px;">a</span><span class="mo" id="MathJax-Span-218" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">=</span><span class="mn" id="MathJax-Span-219" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">0</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.338em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.329em; width: 0px;"></span></span></nobr></span><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;"> hoặc </span><span class="MathJax_Preview" style="background-color: white; border: 0px; color: #888888; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-17-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><nobr style="-webkit-transition: none; border: 0px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; transition: none; vertical-align: 0px;"><span class="math" id="MathJax-Span-220" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 6.793em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 5.003em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.534em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-221" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-222" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">a</span><span class="mo" id="MathJax-Span-223" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">=</span><span class="mi" id="MathJax-Span-224" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">c</span><span class="mo" id="MathJax-Span-225" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">,</span><span class="mi" id="MathJax-Span-226" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.188em; position: static; transition: none; vertical-align: 0px;">b</span><span class="mo" id="MathJax-Span-227" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">=</span><span class="mn" id="MathJax-Span-228" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">0</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.338em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.329em; width: 0px;"></span></span></nobr></span><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;">.</span><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;" /><span style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: medium; margin: 0px; padding: 0px;"><b style="border: 0px; font-size: 18px; margin: 0px; padding: 0px;"><i style="border: 0px; margin: 0px; padding: 0px;">Gợi ý giải Đề thi Đại học </i></b><b style="border: 0px; font-size: 18px; margin: 0px; padding: 0px;"><i style="border: 0px; margin: 0px; padding: 0px;">khối D </i></b><b style="border: 0px; font-size: 18px; margin: 0px; padding: 0px;"><i style="border: 0px; margin: 0px; padding: 0px;">môn Toán năm 2014. <a href="http://book.vnmath.com/2014/07/dap-toan-khoi-d-nam-2014.html" style="-webkit-transition: color 0.25s linear; border: 0px; color: #444444; margin: 0px; padding: 0px; text-decoration: none; transition: color 0.25s linear;">Download file PDF</a></i></b></span><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;" /><br /><div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi-BlMQilW5lKbjG3Xov6bmMov37g6cex6BvG99S00W4jIwOjEt5D2Kmn2L7iFQNdxnCqko1V-lEVowjKjW11yiFbav5tPv5oUeVRBP14zCrGN2KKQw64xJfXMUz_98oDEDb0Bqiz575szY/s1600/dap+an+mon+toan+khoi+d+2014+0.PNG" imageanchor="1" style="-webkit-transition: color 0.25s linear; border: 0px; color: #444444; font-weight: bold; margin: 0px 1em; padding: 0px; text-decoration: none; transition: color 0.25s linear;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi-BlMQilW5lKbjG3Xov6bmMov37g6cex6BvG99S00W4jIwOjEt5D2Kmn2L7iFQNdxnCqko1V-lEVowjKjW11yiFbav5tPv5oUeVRBP14zCrGN2KKQw64xJfXMUz_98oDEDb0Bqiz575szY/s640/dap+an+mon+toan+khoi+d+2014+0.PNG" style="border: none; margin: 0px; padding: 0px;" /></a></div><div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjL8acQbr1aHa_bt7iebuoVycnORQssfrBp04tr91etfvZx7T6i83nLdSO5MYckKuho1ljNyCNltaiJZVzwxbKfyP5Pk-Y23y3YOzxQK_WhPtqkr49o-srzZJcdNiDGiiBl_N_GTJztg1gD/s1600/dap+an+mon+toan+khoi+d+2014+1.PNG" imageanchor="1" style="-webkit-transition: color 0.25s linear; border: 0px; color: #444444; font-weight: bold; margin: 0px 1em; padding: 0px; text-decoration: none; transition: color 0.25s linear;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjL8acQbr1aHa_bt7iebuoVycnORQssfrBp04tr91etfvZx7T6i83nLdSO5MYckKuho1ljNyCNltaiJZVzwxbKfyP5Pk-Y23y3YOzxQK_WhPtqkr49o-srzZJcdNiDGiiBl_N_GTJztg1gD/s640/dap+an+mon+toan+khoi+d+2014+1.PNG" style="border: none; margin: 0px; padding: 0px;" /></a></div><div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px; text-align: center;"></div><div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg1TYtJywOJwVOm-zNzKPJ2RkhC7-BvqtC9Rk7H4EQCfffela0qGM3TdE7Mjl-4qnHzq1YlbAxpswHgw4Ud6Yw7oamH5iinxCCt3IqSIyFALkki-v8h9Y2myRQ-N9yuwJ7aV0Xr4duRLW1o/s1600/dap+an+mon+toan+khoi+d+2014+3.PNG" imageanchor="1" style="-webkit-transition: color 0.25s linear; border: 0px; color: #444444; font-weight: bold; margin: 0px 1em; padding: 0px; text-decoration: none; transition: color 0.25s linear;"><img border="0" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg1TYtJywOJwVOm-zNzKPJ2RkhC7-BvqtC9Rk7H4EQCfffela0qGM3TdE7Mjl-4qnHzq1YlbAxpswHgw4Ud6Yw7oamH5iinxCCt3IqSIyFALkki-v8h9Y2myRQ-N9yuwJ7aV0Xr4duRLW1o/s640/dap+an+mon+toan+khoi+d+2014+3.PNG" style="border: none; margin: 0px; padding: 0px;" width="357" /></a></div><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;">Câu 9. Ta có : </span><span class="MathJax_Preview" style="background-color: white; border: 0px; color: #888888; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-18-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><nobr style="-webkit-transition: none; border: 0px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; transition: none; vertical-align: 0px;"><span class="math" id="MathJax-Span-229" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 10.682em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 7.904em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.238em 1000.003em 2.596em -0.429em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-230" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mo" id="MathJax-Span-231" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">(</span><span class="mi" id="MathJax-Span-232" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">x</span><span class="mo" id="MathJax-Span-233" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">−</span><span class="mn" id="MathJax-Span-234" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">1</span><span class="mo" id="MathJax-Span-235" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">)</span><span class="mo" id="MathJax-Span-236" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">(</span><span class="mi" id="MathJax-Span-237" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">x</span><span class="mo" id="MathJax-Span-238" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">−</span><span class="mn" id="MathJax-Span-239" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">2</span><span class="mo" id="MathJax-Span-240" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">)</span><span class="mo" id="MathJax-Span-241" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">≤</span><span class="mn" id="MathJax-Span-242" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">0</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.504em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.413em; width: 0px;"></span></span></nobr></span><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;"> và </span><span class="MathJax_Preview" style="background-color: white; border: 0px; color: #888888; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-19-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><nobr style="-webkit-transition: none; border: 0px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; transition: none; vertical-align: 0px;"><span class="math" id="MathJax-Span-243" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 10.62em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 7.843em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.238em 1000.003em 2.596em -0.429em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-244" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mo" id="MathJax-Span-245" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">(</span><span class="mi" id="MathJax-Span-246" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">y<span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0.003em;"></span></span><span class="mo" id="MathJax-Span-247" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">−</span><span class="mn" id="MathJax-Span-248" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">1</span><span class="mo" id="MathJax-Span-249" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">)</span><span class="mo" id="MathJax-Span-250" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">(</span><span class="mi" id="MathJax-Span-251" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">y<span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0.003em;"></span></span><span class="mo" id="MathJax-Span-252" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">−</span><span class="mn" id="MathJax-Span-253" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">2</span><span class="mo" id="MathJax-Span-254" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">)</span><span class="mo" id="MathJax-Span-255" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">≤</span><span class="mn" id="MathJax-Span-256" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">0</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.504em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.413em; width: 0px;"></span></span></nobr></span><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;"> nên </span><span class="MathJax_Preview" style="background-color: white; border: 0px; color: #888888; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-20-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><nobr style="-webkit-transition: none; border: 0px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; transition: none; vertical-align: 0px;"><span class="math" id="MathJax-Span-257" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 7.04em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 5.188em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.114em 1000.003em 2.472em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-258" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="msubsup" id="MathJax-Span-259" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 0.991em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.546em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-260" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">x</span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; left: 0.559em; margin: 0px; padding: 0px; position: absolute; top: -2.528em; transition: none; vertical-align: 0px;"><span class="texatom" id="MathJax-Span-261" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-262" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-263" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">2</span></span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="mo" id="MathJax-Span-264" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">≤</span><span class="mn" id="MathJax-Span-265" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">3</span><span class="mi" id="MathJax-Span-266" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">x</span><span class="mo" id="MathJax-Span-267" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">−</span><span class="mn" id="MathJax-Span-268" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">2</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.504em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.246em; width: 0px;"></span></span></nobr></span><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;"> và </span><span class="MathJax_Preview" style="background-color: white; border: 0px; color: #888888; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-21-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><nobr style="-webkit-transition: none; border: 0px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; transition: none; vertical-align: 0px;"><span class="math" id="MathJax-Span-269" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 7.04em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 5.188em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.114em 1000.003em 2.534em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-270" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="msubsup" id="MathJax-Span-271" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 1.052em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.546em 1000.003em 2.534em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-272" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">y<span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0.003em;"></span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; left: 0.62em; margin: 0px; padding: 0px; position: absolute; top: -2.528em; transition: none; vertical-align: 0px;"><span class="texatom" id="MathJax-Span-273" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-274" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-275" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">2</span></span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="mo" id="MathJax-Span-276" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">≤</span><span class="mn" id="MathJax-Span-277" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">3</span><span class="mi" id="MathJax-Span-278" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">y<span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0.003em;"></span></span><span class="mo" id="MathJax-Span-279" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">−</span><span class="mn" id="MathJax-Span-280" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">2</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.588em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.329em; width: 0px;"></span></span></nobr></span><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;">. Do đó</span><span class="MathJax_Preview" style="background-color: white; border: 0px; color: #888888; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;"></span><br /><div aria-readonly="true" class="MathJax_Display" role="textbox" style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 1em 0em; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; position: relative; text-align: center; width: 620px;"><span class="MathJax" id="MathJax-Element-22-Frame" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; text-align: left; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="-webkit-transition: none; border: 0px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; transition: none; vertical-align: 0px;"><span class="math" id="MathJax-Span-281" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 45.744em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 33.892em;"><span style="-webkit-transition: none; border: 0px; clip: rect(0.62em 1000.003em 3.336em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-282" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-283" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">P<span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0.127em;"></span></span><span class="mo" id="MathJax-Span-284" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">≥</span><span class="mfrac" id="MathJax-Span-285" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 0px; margin: 0px 0.127em; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 5.188em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.534em -0.491em); left: 42.015625px; margin: 0px 0px 0px -1.417em; padding: 0px; position: absolute; top: -2.836em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-286" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-287" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">x</span><span class="mo" id="MathJax-Span-288" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+</span><span class="mn" id="MathJax-Span-289" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">2</span><span class="mi" id="MathJax-Span-290" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">y<span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0.003em;"></span></span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.534em -0.491em); left: 42.015625px; margin: 0px 0px 0px -2.528em; padding: 0px; position: absolute; top: -1.478em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-291" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-292" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">3</span><span class="mi" id="MathJax-Span-293" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">x</span><span class="mo" id="MathJax-Span-294" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+</span><span class="mn" id="MathJax-Span-295" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">3</span><span class="mi" id="MathJax-Span-296" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">y<span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0.003em;"></span></span><span class="mo" id="MathJax-Span-297" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+</span><span class="mn" id="MathJax-Span-298" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">3</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(0.806em 1000.003em 1.238em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -1.293em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 5.188em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0.003em; width: 0px;"></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1.052em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="mo" id="MathJax-Span-299" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+</span><span class="mfrac" id="MathJax-Span-300" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 0px; margin: 0px 0.127em; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 5.188em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.534em -0.491em); left: 42.015625px; margin: 0px 0px 0px -1.417em; padding: 0px; position: absolute; top: -2.836em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-301" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-302" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">2</span><span class="mi" id="MathJax-Span-303" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">x</span><span class="mo" id="MathJax-Span-304" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+</span><span class="mi" id="MathJax-Span-305" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">y<span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0.003em;"></span></span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.534em -0.491em); left: 42.015625px; margin: 0px 0px 0px -2.528em; padding: 0px; position: absolute; top: -1.478em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-306" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-307" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">3</span><span class="mi" id="MathJax-Span-308" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">x</span><span class="mo" id="MathJax-Span-309" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+</span><span class="mn" id="MathJax-Span-310" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">3</span><span class="mi" id="MathJax-Span-311" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">y<span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0.003em;"></span></span><span class="mo" id="MathJax-Span-312" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+</span><span class="mn" id="MathJax-Span-313" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">3</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(0.806em 1000.003em 1.238em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -1.293em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 5.188em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0.003em; width: 0px;"></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1.052em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="mo" id="MathJax-Span-314" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+</span><span class="mfrac" id="MathJax-Span-315" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 0px; margin: 0px 0.127em; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 5.435em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.491em); left: 44.015625px; margin: 0px 0px 0px -0.244em; padding: 0px; position: absolute; top: -2.836em; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-316" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">1</span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(1.238em 1000.003em 2.596em -0.552em); left: 44.015625px; margin: 0px 0px 0px -2.651em; padding: 0px; position: absolute; top: -1.417em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-317" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-318" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">4</span><span class="mo" id="MathJax-Span-319" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">(</span><span class="mi" id="MathJax-Span-320" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">x</span><span class="mo" id="MathJax-Span-321" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+</span><span class="mi" id="MathJax-Span-322" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">y<span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0.003em;"></span></span><span class="mo" id="MathJax-Span-323" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">−</span><span class="mn" id="MathJax-Span-324" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">1</span><span class="mo" id="MathJax-Span-325" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">)</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(0.806em 1000.003em 1.238em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -1.293em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 5.435em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0.003em; width: 0px;"></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1.052em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="mo" id="MathJax-Span-326" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">=</span><span class="mfrac" id="MathJax-Span-327" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 0px; margin: 0px 0.127em; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 4.201em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.423em 1000.003em 2.534em -0.491em); left: 34.015625px; margin: 0px 0px 0px -1.17em; padding: 0px; position: absolute; top: -2.836em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-328" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-329" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">x</span><span class="mo" id="MathJax-Span-330" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+</span><span class="mi" id="MathJax-Span-331" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">y<span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0.003em;"></span></span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.534em -0.491em); left: 34.015625px; margin: 0px 0px 0px -2.034em; padding: 0px; position: absolute; top: -1.478em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-332" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-333" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">x</span><span class="mo" id="MathJax-Span-334" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+</span><span class="mi" id="MathJax-Span-335" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">y<span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0.003em;"></span></span><span class="mo" id="MathJax-Span-336" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+</span><span class="mn" id="MathJax-Span-337" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">1</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(0.806em 1000.003em 1.238em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -1.293em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 4.201em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0.003em; width: 0px;"></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1.052em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="mo" id="MathJax-Span-338" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+</span><span class="mfrac" id="MathJax-Span-339" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 0px; margin: 0px 0.127em; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 5.435em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.491em); left: 44.015625px; margin: 0px 0px 0px -0.244em; padding: 0px; position: absolute; top: -2.836em; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-340" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">1</span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(1.238em 1000.003em 2.596em -0.552em); left: 44.015625px; margin: 0px 0px 0px -2.651em; padding: 0px; position: absolute; top: -1.417em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-341" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-342" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">4</span><span class="mo" id="MathJax-Span-343" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">(</span><span class="mi" id="MathJax-Span-344" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">x</span><span class="mo" id="MathJax-Span-345" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+</span><span class="mi" id="MathJax-Span-346" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">y<span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0.003em;"></span></span><span class="mo" id="MathJax-Span-347" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">−</span><span class="mn" id="MathJax-Span-348" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">1</span><span class="mo" id="MathJax-Span-349" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">)</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(0.806em 1000.003em 1.238em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -1.293em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 5.435em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0.003em; width: 0px;"></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1.052em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span></span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 3.337em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -1.412em; width: 0px;"></span></span></nobr></span></div><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;" /><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;">Đặt </span><span class="MathJax_Preview" style="background-color: white; border: 0px; color: #888888; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-23-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><nobr style="-webkit-transition: none; border: 0px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; transition: none; vertical-align: 0px;"><span class="math" id="MathJax-Span-350" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 10.929em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 8.09em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.238em 1000.003em 2.596em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-351" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-352" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">t</span><span class="mo" id="MathJax-Span-353" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">=</span><span class="mi" id="MathJax-Span-354" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">x</span><span class="mo" id="MathJax-Span-355" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+</span><span class="mi" id="MathJax-Span-356" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">y<span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0.003em;"></span></span><span class="mo" id="MathJax-Span-357" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">,</span><span class="mi" id="MathJax-Span-358" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.188em; position: static; transition: none; vertical-align: 0px;">t</span><span class="mo" id="MathJax-Span-359" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">∈</span><span class="mo" id="MathJax-Span-360" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">[</span><span class="mn" id="MathJax-Span-361" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">2</span><span class="mo" id="MathJax-Span-362" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">,</span><span class="mn" id="MathJax-Span-363" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.188em; position: static; transition: none; vertical-align: 0px;">4</span><span class="mo" id="MathJax-Span-364" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">]</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.504em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.413em; width: 0px;"></span></span></nobr></span><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;">, suy ra</span><span class="MathJax_Preview" style="background-color: white; border: 0px; color: #888888; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;"></span><br /><div aria-readonly="true" class="MathJax_Display" role="textbox" style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 1em 0em; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; position: relative; text-align: center; width: 620px;"><span class="MathJax" id="MathJax-Element-24-Frame" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; text-align: left; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="-webkit-transition: none; border: 0px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; transition: none; vertical-align: 0px;"><span class="math" id="MathJax-Span-365" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 16.546em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 12.225em;"><span style="-webkit-transition: none; border: 0px; clip: rect(0.62em 1000.003em 3.336em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-366" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-367" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">P<span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0.127em;"></span></span><span class="mo" id="MathJax-Span-368" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">≥</span><span class="mfrac" id="MathJax-Span-369" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 0px; margin: 0px 0.127em; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 2.225em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.361em 1000.003em 2.349em -0.552em); left: 18.015625px; margin: 0px 0px 0px -0.182em; padding: 0px; position: absolute; top: -2.836em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-370" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">t</span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.41em -0.552em); left: 18.015625px; margin: 0px 0px 0px -1.046em; padding: 0px; position: absolute; top: -1.478em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-371" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-372" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">t</span><span class="mo" id="MathJax-Span-373" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+</span><span class="mn" id="MathJax-Span-374" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">1</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(0.806em 1000.003em 1.238em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -1.293em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 2.225em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0.003em; width: 0px;"></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1.052em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="mo" id="MathJax-Span-375" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+</span><span class="mfrac" id="MathJax-Span-376" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 0px; margin: 0px 0.127em; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 3.46em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.491em); left: 28.015625px; margin: 0px 0px 0px -0.244em; padding: 0px; position: absolute; top: -2.836em; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-377" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">1</span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(1.238em 1000.003em 2.596em -0.552em); left: 28.015625px; margin: 0px 0px 0px -1.664em; padding: 0px; position: absolute; top: -1.417em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-378" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-379" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">4</span><span class="mo" id="MathJax-Span-380" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">(</span><span class="mi" id="MathJax-Span-381" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">t</span><span class="mo" id="MathJax-Span-382" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">−</span><span class="mn" id="MathJax-Span-383" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">1</span><span class="mo" id="MathJax-Span-384" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">)</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(0.806em 1000.003em 1.238em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -1.293em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 3.46em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0.003em; width: 0px;"></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1.052em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="mo" id="MathJax-Span-385" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">≥</span><span class="mfrac" id="MathJax-Span-386" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 0px; margin: 0px 0.127em; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 0.62em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.491em); left: 5.015625px; margin: 0px 0px 0px -0.244em; padding: 0px; position: absolute; top: -2.836em; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-387" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">7</span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.491em); left: 5.015625px; margin: 0px 0px 0px -0.244em; padding: 0px; position: absolute; top: -1.478em; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-388" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">8</span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(0.806em 1000.003em 1.238em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -1.293em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.62em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0.003em; width: 0px;"></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1.052em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="mo" id="MathJax-Span-389" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.188em; position: static; transition: none; vertical-align: 0px;">.</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 3.337em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -1.412em; width: 0px;"></span></span></nobr></span></div><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;" /><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;">Vậy </span><span class="MathJax_Preview" style="background-color: white; border: 0px; color: #888888; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-25-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><nobr style="-webkit-transition: none; border: 0px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; transition: none; vertical-align: 0px;"><span class="math" id="MathJax-Span-390" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 6.361em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 4.694em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.052em 1000.003em 2.781em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-391" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mo" id="MathJax-Span-392" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">min</span><span class="mi" id="MathJax-Span-393" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.188em; position: static; transition: none; vertical-align: 0px;">P<span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0.127em;"></span></span><span class="mo" id="MathJax-Span-394" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">=</span><span class="mfrac" id="MathJax-Span-395" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 0px; margin: 0px 0.127em; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 0.497em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.485em 1000.003em 2.349em -0.491em); left: 4.015625px; margin: 0px 0px 0px -0.182em; padding: 0px; position: absolute; top: -2.59em; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-396" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">7</span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(1.485em 1000.003em 2.349em -0.552em); left: 4.015625px; margin: 0px 0px 0px -0.182em; padding: 0px; position: absolute; top: -1.787em; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-397" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">8</span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span><span style="-webkit-transition: none; border: 0px; clip: rect(0.806em 1000.003em 1.238em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -1.293em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.497em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0.003em; width: 0px;"></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 1.052em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span></span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 2.004em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.662em; width: 0px;"></span></span></nobr></span><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;"> khi </span><span class="MathJax_Preview" style="background-color: white; border: 0px; color: #888888; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-26-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><nobr style="-webkit-transition: none; border: 0px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; transition: none; vertical-align: 0px;"><span class="math" id="MathJax-Span-398" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 3.028em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 2.225em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-399" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-400" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">t</span><span class="mo" id="MathJax-Span-401" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">=</span><span class="mn" id="MathJax-Span-402" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">3</span></span><span style="-webkit-transition: none; border: 0px; display: inline-block; height: 2.164em; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0px;"></span></span></span><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.088em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.079em; width: 0px;"></span></span></nobr></span><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;">.</span><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;" /><i style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;"><br style="margin: 0px; padding: 0px;" /></i><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;"></span><i style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;">Nhận xét chung:</i><br /><blockquote style="background-color: white; border-left-color: rgb(221, 221, 221); border-left-style: solid; border-width: 0px 0px 0px 3px; color: #444444; font-family: Arial; font-size: 12px; font-style: italic; line-height: 20.399999618530273px; margin: 0px 0px 0px 25px; padding: 0px 0px 0px 20px;">Toán khối B: Phổ điểm tập trung mức 5, 6.<br style="margin: 0px; padding: 0px;" /><br style="margin: 0px; padding: 0px;" />Đánh giá đề thi môn toán khối B, ThS Trương Huy Hoàng - giảng viên toán Trường dự bị ĐH TP.HCM - cho rằng đề toán khối B hay hơn đề khối A. Từ câu 1 đến câu 5 là những câu tương đối nhẹ nhàng. Câu 6 về hình học không gian cổ điển đòi hỏi phải tính toán nhiều và hay hơn, hơi khó hơn đề khối A một chút. Câu 7 có mức độ khó như đề khối A và hai câu 8, 9 là những câu rất khó để phân loại thí sinh.<br style="margin: 0px; padding: 0px;" /><br style="margin: 0px; padding: 0px;" />Để làm được hai câu này, thí sinh phải thực sự xuất sắc, đã rèn luyện nhiều và từng làm qua dạng toán này. Với đề thi này, học sinh trung bình khá có thể đạt 5 đến 6 điểm, học sinh khá giỏi có thể đạt 7 đến 8 điểm. Sẽ rất ít thí sinh có thể đạt được điểm 9, 10.<br style="margin: 0px; padding: 0px;" /><br style="margin: 0px; padding: 0px;" />Toán khối D: Không khó lấy điểm 7<br style="margin: 0px; padding: 0px;" /><br style="margin: 0px; padding: 0px;" />Nhận xét về đề thi môn toán khối D, thầy Trần Quang Ngọc - hiệu trưởng Trường THPT Lạc Hồng (TP.HCM) - cho biết đề thi năm nay ra theo xu hướng không có phần tự chọn, thí sinh đều làm đề giống nhau. Các câu hỏi trong đề thi được xếp theo thứ tự từ dễ đến khó, đây là điều rất thuận lợi cho thí sinh khi làm bài. Trong đề có 6 câu tương đối nhẹ nhàng, chỉ có 3 câu khó là 7, 8 và 9.<br style="margin: 0px; padding: 0px;" /><br style="margin: 0px; padding: 0px;" />Với đề thi như vậy, học sinh trung bình khá có thể đạt 7 điểm không mấy khó khăn. Từ 8 điểm trở lên học sinh phải rất giỏi. Câu 7 là câu hình học có mức độ khó tương đương đề khối A. Trong khi đó, hai câu khó nhất đề là câu 8 và 9 dễ hơn đề khối A. Với đề thi này, phổ điểm tập trung ở mức 6 đến 7 điểm, đạt từ 8 điểm tương đối khó.</blockquote>Unknownnoreply@blogger.comtag:blogger.com,1999:blog-6690046711930903487.post-78257524901891550552015-05-07T01:40:00.000-07:002015-10-15T05:32:38.493-07:00Đề thi thử môn Toán Học Kỳ II lớp 10, lớp 11, lớp 12<span style="background-color: white; color: #666666; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;">Bộ đề Ôn thi học Kỳ 2 lớp 12 của Nguyễn Đình Cư, Nguyễn Bá Tuấn. </span><a href="http://books.vnmath.com/2012/03/de-thi-thu-hoc-ky-2-nam-2012-mon-toan.html" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">Download.</a><br style="background-color: white; color: #666666; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #666666; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #666666; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">Đề thi thử học kì II môn Toán lớp 12</b><span style="background-color: white; color: #666666; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> của thầy Phạm Ngọc Tài. </span><a href="http://www.mediafire.com/?858lch66tknijp6" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">Download.</a><br /><br /><span style="background-color: white; color: #666666; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;">Tài liệu gồm 28 Đề thi Học kì 2 môn Toán lớp 12 và Bộ Đề cương theo chủ đề ôn thi Toán lớp 12 HK 2 năm học 2010 - 2011 của thầy Hồ Văn Hoàng trường THPT Nguyễn Huệ. </span><a href="http://www.mediafire.com/?4o21l9eao018mhs" target="_blank">Download.</a><br /><br style="background-color: white; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #666666; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">Đề thi thử môn Toán Học Kỳ 2 lớp 11 </b><span style="background-color: white; color: #666666; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;">(thầy Lưu Phi Hoàng). </span><a href="http://books.vnmath.com/2013/04/de-thi-thu-hoc-ki-2-mon-toan-lop-11-luu.html" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">Download.</a><br style="background-color: white; color: #666666; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #666666; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><span style="background-color: white; color: #666666; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;">Đề thi thử môn Toán Học Kỳ II lớp 11 (thầy Phạm Ngọc Tài). </span><a href="http://books.vnmath.com/2012/03/de-thi-hk2-toan-11-nam-2012.html" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">Download.</a><br style="background-color: white; color: #666666; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #666666; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #666666; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">Đề thi thử môn Toán lớp 10 học kỳ II.</b><span style="background-color: white; color: #666666; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"> </span><a href="http://books.vnmath.com/2012/03/de-thi-hoc-ky-2-toan-10-nam-2012.html" style="-webkit-transition-duration: 0.25s; -webkit-transition-property: color; -webkit-transition-timing-function: linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition-duration: 0.25s; transition-property: color; transition-timing-function: linear;">Download.</a>Unknownnoreply@blogger.comtag:blogger.com,1999:blog-6690046711930903487.post-72184184303476335332015-05-06T21:49:00.000-07:002015-10-15T05:32:38.527-07:00Các chuyên đề Toán lớp 9 (file word)<span style="background-color: white; color: #666666; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;">Các chuyên đề Toán lớp 9 (file word, hay) dùng cho ôn tập và luyện thi vào lớp 10. Tài liệu dày 46 trang, soạn bằng MSWord dễ dàng chỉnh sửa theo nhu cầu. </span><a href="http://mathbookee.blogspot.com/2011/11/math-9-chuyen-de-toan.html" style="-webkit-transition: color 0.25s linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition: color 0.25s linear;">Download 1</a><span style="background-color: white; color: #666666; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;">. </span><a href="http://www.mediafire.com/?7mjdt6x2m3myem2" style="-webkit-transition: color 0.25s linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition: color 0.25s linear;" target="_blank">Download 2</a><span style="background-color: white; color: #666666; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;">.</span>Unknownnoreply@blogger.comtag:blogger.com,1999:blog-6690046711930903487.post-20360340541977963832015-05-05T23:05:00.000-07:002015-10-15T05:32:38.550-07:00Giải câu hệ phương trình khối A năm 2014 bằng nhiều cách<div style="background-color: white; border: 0px; color: #666666; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin-bottom: 5px; padding: 5px 0px;"><b style="border: 0px; margin: 0px; padding: 0px;">Cách 1: </b>(Chia sẻ bở Ngô Chí Cường)</div><div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi15VYfmVVn3Zd8S8qq0Sdf6ur72VBQ-bHR3gulunL5UsBXJ0g1dtyXlEN-JHOJH1aw4C3p96mpx3Y8BnlgZTyqgEpSE2l_wpXtlvKl8jyIozSIUPmOLW-9zRZmBoxmzbcyaGJHX8ZyEHoQ/s1600/c1.PNG" imageanchor="1" style="-webkit-transition: color 0.25s linear; border: 0px; color: #444444; font-weight: bold; margin: 0px 1em; padding: 0px; text-decoration: none; transition: color 0.25s linear;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi15VYfmVVn3Zd8S8qq0Sdf6ur72VBQ-bHR3gulunL5UsBXJ0g1dtyXlEN-JHOJH1aw4C3p96mpx3Y8BnlgZTyqgEpSE2l_wpXtlvKl8jyIozSIUPmOLW-9zRZmBoxmzbcyaGJHX8ZyEHoQ/s640/c1.PNG" style="border: none; margin: 0px; padding: 0px;" /></a></div><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;">Cách 2:</b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;"> (Chia sẻ bởi Trần Tuấn Anh)</span><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;" /><br /><div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjfli9eVrZMVWgq_d7ne79eAv_5784o4QYjS08CqbMRx8XgqaMd2qeSpgLb0O2dY-G9jep9B7sVpUfICF_JkImi7_T853gezx78gHZJMNrtcwfwLtuvbemsZdw_bAHnIAhT_l_cK8Mmlh77/s1600/IMG-20140704-00107.jpg" imageanchor="1" style="-webkit-transition: color 0.25s linear; border: 0px; color: #444444; font-weight: bold; margin: 0px 1em; padding: 0px; text-decoration: none; transition: color 0.25s linear;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjfli9eVrZMVWgq_d7ne79eAv_5784o4QYjS08CqbMRx8XgqaMd2qeSpgLb0O2dY-G9jep9B7sVpUfICF_JkImi7_T853gezx78gHZJMNrtcwfwLtuvbemsZdw_bAHnIAhT_l_cK8Mmlh77/s640/IMG-20140704-00107.jpg" style="border: none; margin: 0px; padding: 0px;" /></a></div><div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhw_4HkMrdk61dwSP-0RsDso9y_r2fG5r_bXUJbs4vFK9KTzx_E1f_ZpdRziUjDAzFpYvja8mSSj-w1mrVbyg2-_3pyNxmZHBIlDUNIzMR4EwAseln4c-C3O_RbcVTBAyln8wJK0k7jhyphenhyphenDj/s1600/IMG-20140704-00108.jpg" imageanchor="1" style="-webkit-transition: color 0.25s linear; border: 0px; color: #444444; font-weight: bold; margin: 0px 1em; padding: 0px; text-decoration: none; transition: color 0.25s linear;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhw_4HkMrdk61dwSP-0RsDso9y_r2fG5r_bXUJbs4vFK9KTzx_E1f_ZpdRziUjDAzFpYvja8mSSj-w1mrVbyg2-_3pyNxmZHBIlDUNIzMR4EwAseln4c-C3O_RbcVTBAyln8wJK0k7jhyphenhyphenDj/s640/IMG-20140704-00108.jpg" style="border: none; margin: 0px; padding: 0px;" /></a></div><div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh6DIvybro5kAGvJ_lCdXesLQGGkKqb3PzR4on_5Wp2sU67cIQxm-XtoPAUNVxDLTg6DEob-oDtRDLjbjaclnuOompmANzq-WNcqtSohRvxo7Szc6Cvz5DLkJIvZi_PV2_8j84CScpkm-3d/s1600/IMG-20140704-00109.jpg" imageanchor="1" style="-webkit-transition: color 0.25s linear; border: 0px; color: #444444; font-weight: bold; margin: 0px 1em; padding: 0px; text-decoration: none; transition: color 0.25s linear;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh6DIvybro5kAGvJ_lCdXesLQGGkKqb3PzR4on_5Wp2sU67cIQxm-XtoPAUNVxDLTg6DEob-oDtRDLjbjaclnuOompmANzq-WNcqtSohRvxo7Szc6Cvz5DLkJIvZi_PV2_8j84CScpkm-3d/s640/IMG-20140704-00109.jpg" style="border: none; margin: 0px; padding: 0px;" /></a></div><div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px; text-align: center;"></div><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;"><br style="margin: 0px; padding: 0px;" /></b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;"></span><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;">Cách 3: </b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;">(Chia sẻ bở Ngô Chí Cường)</span><br /><div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEijkJnuGJMo6xWU91slU-h5oL5t5Yiy13zVM3_3n5jx1h8fYnaHSxTlyvIgqZ1eky-IfIRSTMfyJGkkiLhgqq3W4HrbxdlhYz8fEL0uGjVIMNet8qVOCVvLbtP8JeYstw7UgyO5AySBRx0i/s1600/c3.PNG" imageanchor="1" style="-webkit-transition: color 0.25s linear; border: 0px; color: #444444; font-weight: bold; margin: 0px 1em; padding: 0px; text-decoration: none; transition: color 0.25s linear;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEijkJnuGJMo6xWU91slU-h5oL5t5Yiy13zVM3_3n5jx1h8fYnaHSxTlyvIgqZ1eky-IfIRSTMfyJGkkiLhgqq3W4HrbxdlhYz8fEL0uGjVIMNet8qVOCVvLbtP8JeYstw7UgyO5AySBRx0i/s640/c3.PNG" style="border: none; margin: 0px; padding: 0px;" /></a></div><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;">Cách 4: </b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;">(Chia sẻ bởi Vương Julian)</span><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;" /><br /><div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjgjUlDB8qYo1v_xcrzQWVoVQ1U691x6TlLNwc4BqtEFA5xkRxVyYZGYZibjBcVkf5o2FlFv1uGglCLDqUDgqM01gNHCHcMTMxQW9onMXQWgZ18YTPjlcTnNBPeDIdkCiIU7wTTuax1R-71/s1600/c1.PNG" imageanchor="1" style="-webkit-transition: color 0.25s linear; border: 0px; color: #444444; font-weight: bold; margin: 0px 1em; padding: 0px; text-decoration: none; transition: color 0.25s linear;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjgjUlDB8qYo1v_xcrzQWVoVQ1U691x6TlLNwc4BqtEFA5xkRxVyYZGYZibjBcVkf5o2FlFv1uGglCLDqUDgqM01gNHCHcMTMxQW9onMXQWgZ18YTPjlcTnNBPeDIdkCiIU7wTTuax1R-71/s640/c1.PNG" style="border: none; margin: 0px; padding: 0px;" /></a></div><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;">Cách 5: </b><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;">(Thấy trong phòng thi)</span><br /><div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhuIFFFufD1YD2U41ITQi5LWbMFK6LpLZiZMf1fadMCnuH4WBuoe2MUFsb-1XTjxTDZFv8mcYrDi9nxJ6Gr-ey-5wKvnp8WKEGcj5YtBV9ab8rFw725jF_jkJZtyjtK1ex5YDoPFaghSCgA/s1600/Photonia+(3).jpg" imageanchor="1" style="-webkit-transition: color 0.25s linear; border: 0px; color: #444444; font-weight: bold; margin: 0px 1em; padding: 0px; text-decoration: none; transition: color 0.25s linear;"><img alt="Giải câu hệ phương trình khối A năm 2014 bằng nhiều cách" border="0" height="425" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhuIFFFufD1YD2U41ITQi5LWbMFK6LpLZiZMf1fadMCnuH4WBuoe2MUFsb-1XTjxTDZFv8mcYrDi9nxJ6Gr-ey-5wKvnp8WKEGcj5YtBV9ab8rFw725jF_jkJZtyjtK1ex5YDoPFaghSCgA/s640/Photonia+(3).jpg" style="border: none; margin: 0px; padding: 0px;" title="Giải câu hệ phương trình khối A năm 2014 bằng nhiều cách" width="600" /></a></div><div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px; text-align: center;"></div><div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px; text-align: center;"></div><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;">Cách 6: </b><br /><div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhEEJzCqanPKFOnpgm_kAYzyQ84pXjBr2vYdFwURS36ubiVdvgvU6cIjms8cRh6eyrd9VgYeTfB_PwwmRkxc-jy3Tu3xdgsIoUfSOpdFbXsTT4WyjU1X_80PqCCXxnyp4iKim5ZZmK0TFjr/s1600/c7.PNG" imageanchor="1" style="-webkit-transition: color 0.25s linear; border: 0px; color: #444444; font-weight: bold; margin: 0px 1em; padding: 0px; text-decoration: none; transition: color 0.25s linear;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhEEJzCqanPKFOnpgm_kAYzyQ84pXjBr2vYdFwURS36ubiVdvgvU6cIjms8cRh6eyrd9VgYeTfB_PwwmRkxc-jy3Tu3xdgsIoUfSOpdFbXsTT4WyjU1X_80PqCCXxnyp4iKim5ZZmK0TFjr/s640/c7.PNG" style="border: none; margin: 0px; padding: 0px;" /></a></div><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;">Thiết nghĩ còn có cách khác để giải câu hệ phương trình này, chẳng hạn một số bạn đặt ẩn phụ rồi đưa về phương trình bậc 6 khá cồng kềnh... </span><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 0px; padding: 0px;" /><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;">Bạn còn biết cách nào nữa không? Nếu có thì chia sẻ nhé.</span><br /><div><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px;"><br /></span></div>Unknownnoreply@blogger.comtag:blogger.com,1999:blog-6690046711930903487.post-47260049221879406422015-05-05T00:45:00.000-07:002015-10-15T05:32:38.584-07:00THỦ THUẬT BLOGGERhttp://chinhtrucblog.blogspot.com/2013/10/tao-nhieu-chuyen-muc-cho-bai-viet-theo.htmlUnknownnoreply@blogger.comtag:blogger.com,1999:blog-6690046711930903487.post-62500561265761377412015-04-30T21:44:00.000-07:002015-10-15T05:32:38.599-07:00Tuyệt chiêu giải bất đẳng thức luyện thi năm 2015 - Lê Xuân Đại<div style="background-color: white; border: 0px; color: #666666; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin-bottom: 5px; padding: 5px 0px;">Tuyệt chiêu giải bất đẳng thức luyện thi năm 2015 gồm 5 chuyên đề bất đẳng thức luyện thi đại học năm 2015 của thầy Lê Xuân Đại, GV THPT chuyên Vĩnh Phúc. Tài liệu do chính tác giả gửi đăng trên VNMATH.</div><div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhJ6Fvv_cLtEYqY1FgBbJ7_ZzYzD6tVyHOYvS6PJJxVV2wjvnQWXuIkHyS3aZigyurk9m3mWdyOR6pdfy6MeBAvIPdEU759QSPcOp4Jz6iKL7Q4VEZVj1zHOPjVgfUXX-m7N7sCDB-u5T19/s1600/tuyet+chieu+giai+bat+dang+thuc+trong+de+thi+dai+hoc+2015.PNG" imageanchor="1" style="-webkit-transition: color 0.25s linear; border: 0px; color: #444444; font-weight: bold; margin: 0px 1em; padding: 0px; text-decoration: none; transition: color 0.25s linear;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhJ6Fvv_cLtEYqY1FgBbJ7_ZzYzD6tVyHOYvS6PJJxVV2wjvnQWXuIkHyS3aZigyurk9m3mWdyOR6pdfy6MeBAvIPdEU759QSPcOp4Jz6iKL7Q4VEZVj1zHOPjVgfUXX-m7N7sCDB-u5T19/s640/tuyet+chieu+giai+bat+dang+thuc+trong+de+thi+dai+hoc+2015.PNG" style="border: none; margin: 0px; padding: 0px;" /></a></div><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;">Tài liệu gồm 5 phần (52 trang):</span><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;">1. Biến đổi tương đương</span><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;">2. Phương pháp sử dụng bất đẳng thức Cauchy</span><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;">3. Phương pháp thêm bớt hạng tử và chọn điểm rơi Cô-si</span><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;">4. Phương pháp sử dụng đạo hàm</span><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;">5. Các đề thi đại học và lời giải</span><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><b style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;">Chuyên đề Bất đẳng thức Luyện thi Đại học 2015. <a href="https://drive.google.com/file/d/0B1UntQgSATvxY1dyLVpYRlFyR3c/view?usp=sharing" style="-webkit-transition: color 0.25s linear; border: 0px; color: #444444; margin: 0px; padding: 0px; text-decoration: none; transition: color 0.25s linear;" target="_blank">Download.</a></b>Unknownnoreply@blogger.comtag:blogger.com,1999:blog-6690046711930903487.post-91201355742804520402015-04-06T20:04:00.000-07:002015-10-15T05:32:38.635-07:00 Đề thi mẫu Kì thi THPT quốc gia 2015 của Bộ Giáo dục Nhằm tạo thuận lợi cho thí sinh dự thi, Bộ Giáo dục giới thiệu các đề thi minh họa, kèm theo đáp án để giáo viên và học sinh tham khảo. Các đề thi minh họa sẽ không được sử dụng làm đề thi chính thức, nhưng qua đó học sinh sẽ hình dung được mức độ yêu cầu của đề thi chính thức để ôn tập.<br /><br /><br /><div style="text-align: center;"><b><span style="color: magenta; font-size: medium;">Đề thi minh họa Kì thi THPT quốc gia 2015 của Bộ Giáo dục tất cả các môn và đáp án. <a href="https://drive.google.com/file/d/0B1UntQgSATvxcXl6N3JDY3JPQjA/view?usp=sharing">Download.</a></span></b></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj6v8DppEWADNolUWzaFckyjvcJzqVzj5xXRUpzgq1PutyQkHUAf-06RrCsFjNwJIhXiOr5qwipCJ0KuKTwqL3JUTOPLyfLHmadPjW8krFsdj0L85javNUScI6FRPZERsm_D5EnFrB85bXs/s1600/de+thi+minh+hoa+thpt+quoc+gia+2015+cua+bo+giao+duc.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj6v8DppEWADNolUWzaFckyjvcJzqVzj5xXRUpzgq1PutyQkHUAf-06RrCsFjNwJIhXiOr5qwipCJ0KuKTwqL3JUTOPLyfLHmadPjW8krFsdj0L85javNUScI6FRPZERsm_D5EnFrB85bXs/s640/de+thi+minh+hoa+thpt+quoc+gia+2015+cua+bo+giao+duc.jpg" /></a></div><br />Đề thi đặt ra yêu cầu ở 2 mức độ cơ bản và nâng cao, tương tự đề thi tốt nghiệp THPT và tuyển sinh đại học, cao đẳng năm 2014. Trong đó, tỷ lệ điểm dành cho mức độ cơ bản chiếm khoảng 60% tổng số điểm và cho mức độ nâng cao chiếm khoảng 40% tổng số điểm để đảm bảo phân loại được trình độ của thí sinh.<br /><br />Đề thi ra theo hướng đánh giá năng lực người học, tăng cường các câu hỏi vận dụng kiến thức, giảm yêu cầu thuộc lòng, ghi nhớ máy móc hay trả lời theo khuôn mẫu có sẵn. Đề thi các môn khoa học xã hội tiếp tục ra theo hướng mở.<br /><table align="center" border="1" cellpadding="0" cellspacing="0"><tbody><tr><td><br /><div class="Normal" style="text-align: center;"><strong>Đề minh họa kì thi THPT quốc gia 2015 và đáp án</strong></div></td> <td style="text-align: center;"><br /><strong> Môn Ngoại ngữ</strong></td> </tr><tr><td><br /><div class="Normal" style="text-align: center;"><a href="http://c0.attachment.vnecdn.net/document/2015/03/31/17/1-de-da-mh-toan-k15-1427796981.pdf" target="_blank">Toán</a></div></td> <td style="text-align: center;"><br /><a href="http://c0.attachment.vnecdn.net/document/2015/03/31/17/8-de-da-mh-t-anh-k15-1427797076.pdf" style="line-height: 20px; text-align: center;" target="_blank">Tiếng Anh</a></td> </tr><tr><td><br /><div class="Normal" style="text-align: center;"><a href="http://c0.attachment.vnecdn.net/document/2015/03/31/17/2-de-da-mh-vat-li-k15-1427796992.pdf" target="_blank">Lý</a></div></td> <td style="text-align: center;"><br /><a href="http://c0.attachment.vnecdn.net/document/2015/03/31/17/91-de-da-mh-t-nga-k15-1427797087.pdf" style="line-height: 20px; text-align: center;" target="_blank">Tiếng Nga</a></td> </tr><tr><td><br /><div class="Normal" style="text-align: center;"><a href="http://c0.attachment.vnecdn.net/document/2015/03/31/17/3-de-da-mh-hoa-hoc-k15-1427797003.pdf" target="_blank">Hóa</a></div></td> <td style="text-align: center;"><br /><a href="http://c0.attachment.vnecdn.net/document/2015/03/31/17/92-de-da-mh-t-phap-k15-1427797097.pdf" style="line-height: 20px; text-align: center;" target="_blank">Tiếng Pháp</a></td> </tr><tr><td><br /><div class="Normal" style="text-align: center;"><a href="http://c0.attachment.vnecdn.net/document/2015/03/31/17/4-de-da-mh-sinh-hoc-k15-1427797015.pdf" target="_blank">Sinh</a></div></td> <td style="text-align: center;"><br /><a href="http://c0.attachment.vnecdn.net/document/2015/03/31/17/93-de-da-mh-t-trung-k15-1427797107.pdf" style="line-height: 20px; text-align: center;" target="_blank">Tiếng Trung</a></td> </tr><tr><td><br /><div class="Normal" style="text-align: center;"><a href="http://c0.attachment.vnecdn.net/document/2015/03/31/17/5-de-da-mh-ngu-van-k15-1427797025.pdf" target="_blank">Văn</a></div></td> <td style="text-align: center;"><br /><a href="http://c0.attachment.vnecdn.net/document/2015/03/31/17/94-de-da-mh-t-duc-k15-1427797119.pdf" style="line-height: 20px; text-align: center;" target="_blank">Tiếng Đức</a></td> </tr><tr><td><br /><div class="Normal" style="text-align: center;"><a href="http://c0.attachment.vnecdn.net/document/2015/03/31/17/6-de-da-mh-lich-su-k15-1427797036.pdf" target="_blank">Sử</a></div></td> <td style="text-align: center;"><br /><a href="http://c0.attachment.vnecdn.net/document/2015/03/31/17/95-de-da-mh-t-nhat-k15-1427797129.pdf" style="line-height: 20px; text-align: center;" target="_blank">Tiếng Nhật</a></td> </tr><tr><td><br /><div class="Normal" style="text-align: center;"><a href="http://c0.attachment.vnecdn.net/document/2015/03/31/17/7-de-da-mh-dia-li-k15-1427797047.pdf" target="_blank">Địa</a></div></td> <td><br /></td> </tr></tbody></table><div style="text-align: center;"><i>Bảng. Đề thi mẫu Kì thi THPT quốc gia 2015 của Bộ Giáo dục</i></div><div style="text-align: center;"><i><br /></i></div>Về hình thức, đề thi môn Ngữ văn có 2 phần: phần đọc hiểu và phần làm văn; trong đó tỷ lệ điểm dành cho phần đọc hiểu chiếm khoảng 30% tổng số điểm. Đề thi các môn Ngoại ngữ có 2 phần: phần viết và phần trắc nghiệm; trong đó tỷ lệ điểm dành cho phần viết chiếm khoảng 20% tổng số điểm. Unknownnoreply@blogger.comtag:blogger.com,1999:blog-6690046711930903487.post-62056051873776064382015-04-04T21:25:00.000-07:002015-10-15T05:32:38.650-07:00Các đề ôn tập chương Giới hạn lớp 11<div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhkRvVIp6IXnbMXOeLPiFikr4hR0NbFne3oscCnxE59hpZ4jkmyvLjWcEbDUKxq0xcbxH4En97Hyao6H2ZhRiampxe59wfwVsENF0XWY94i7GgFRFmkzJZRH5edBJgqrDUeisWS_SYyX83q/s1600/de+kiem+tra+gioi+han.PNG" imageanchor="1" style="-webkit-transition: color 0.25s linear; border: 0px; color: #444444; font-weight: bold; margin: 0px 1em; padding: 0px; text-decoration: none; transition: color 0.25s linear;"><img alt="đề kiểm tra 1 tiết chương giới hạn, hàm số liên tục" border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhkRvVIp6IXnbMXOeLPiFikr4hR0NbFne3oscCnxE59hpZ4jkmyvLjWcEbDUKxq0xcbxH4En97Hyao6H2ZhRiampxe59wfwVsENF0XWY94i7GgFRFmkzJZRH5edBJgqrDUeisWS_SYyX83q/s640/de+kiem+tra+gioi+han.PNG" style="border: none; margin: 0px; padding: 0px;" title="đề kiểm tra 1 tiết chương giới hạn, hàm số liên tục lớp 11" /></a></div><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;">Các đề ôn tập, kiểm tra chương Giới hạn và liên tục trong chương trình Toán lớp 11 THPT. </span><a href="https://drive.google.com/file/d/0B1UntQgSATvxTWdURWFMVVk0b2s/view?usp=sharing" style="-webkit-transition: color 0.25s linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition: color 0.25s linear;">Download file Word.</a><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;"></span><br /><div><br /></div>Unknownnoreply@blogger.comtag:blogger.com,1999:blog-6690046711930903487.post-87683688013857708952015-04-03T21:21:00.000-07:002015-10-15T05:32:38.684-07:0042 bài tích phân có lời giải năm 2015 dùng để luyện thi<span style="background-color: white; color: #666666; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;">42 bài tích phân có lời giải năm 2015 dùng để luyện thi.</span><br style="background-color: white; color: #666666; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #666666; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><span style="background-color: white; color: #666666; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;">Soạn bởi thầy Phạm Năng Khánh, THPT Nguyễn Siêu, Hưng Yên.</span><br style="background-color: white; color: #666666; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #666666; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><a href="https://drive.google.com/file/d/0B1UntQgSATvxeUJ2T0cwQS1jVDA/view?usp=sharing" style="-webkit-transition: color 0.25s linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition: color 0.25s linear;">Download đề và đáp án.</a>Unknownnoreply@blogger.comtag:blogger.com,1999:blog-6690046711930903487.post-77997464900603778172015-04-01T21:22:00.000-07:002015-10-15T05:32:38.697-07:00Đề cương học tập Toán 10 (2 tập) - Lê Văn Đoàn<div class="separator" style="background-color: white; border: 0px; clear: both; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEipZcxTIp_vaiP3Hg8kwpDzwO6S1_AH1wOg4Jpc7XosLwMRuv454zjzGKU4xN2KSgzX-lwjr7AL8nYmCt-thMSiqefEfFv5AFQxf1MkfXqwyJk-yHpb72mpnILUtutINNNSaFxYfaVb_muC/s1600/de+cuonmg+hoc+tap+toan+10.PNG" imageanchor="1" style="-webkit-transition: color 0.25s linear; border: 0px; color: #444444; font-weight: bold; margin: 0px 1em; outline: none; padding: 0px; text-decoration: none; transition: color 0.25s linear;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEipZcxTIp_vaiP3Hg8kwpDzwO6S1_AH1wOg4Jpc7XosLwMRuv454zjzGKU4xN2KSgzX-lwjr7AL8nYmCt-thMSiqefEfFv5AFQxf1MkfXqwyJk-yHpb72mpnILUtutINNNSaFxYfaVb_muC/s640/de+cuonmg+hoc+tap+toan+10.PNG" style="border: none; margin: 0px; padding: 0px;" /></a></div><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;">Đề cương học tập Toán 10 - Tập 1 - Lê Văn Đoàn. </span><a href="https://drive.google.com/file/d/0B1UntQgSATvxN2RVQWxqLWQxdUk/view?usp=sharing" style="-webkit-transition: color 0.25s linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition: color 0.25s linear;">Download.</a><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><br style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px; margin: 0px; padding: 0px;" /><span style="background-color: white; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.3999996185303px;">Đề cương học tập Toán 10 - Tập 2 - Lê Văn Đoàn. </span><a href="https://drive.google.com/file/d/0B1UntQgSATvxUmJsQ2REbFFhdlU/view?usp=sharing" style="-webkit-transition: color 0.25s linear; background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; font-weight: bold; line-height: 20.3999996185303px; margin: 0px; padding: 0px; text-decoration: none; transition: color 0.25s linear;">Download.</a>Unknownnoreply@blogger.com