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Authored by Thầy (thaytuudaytoan)
Mathematics
12th Grade

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138 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
[Câu 3 - Đề minh họa lần 1 BGD 2020 - 2021] Cho hàm số f(x) có bảng biến thiên như sau: \begin{center} \begin{tikzpicture} \tkzTabInit[nocadre=false,lgt=1.2,espcl=2.5,deltacl=0.6] {x /0.6,y' /0.6,y /2} {-\infty,-2,0,2,+\infty} \tkzTabLine{,+,0,-,0,+,0,-,} \tkzTabVar{-/-\infty, +/1,-/1,+/1,-/-\infty} \end{tikzpicture} \end{center} Hàm số đã cho đồng biến trên khoảng nào, trong các khoảng dưới đây?
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
[Câu 30 - Đề minh họa lần 1 BGD 2020 - 2021] Hàm số nào dưới đây đồng biến trên \mathbb{R}?
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho hàm số y=f(x) có bảng biến thiên như hình vẽ. \begin{center} \begin{tikzpicture} \tkzTabInit[lgt=1.2,espcl=2.5] {x/0.8, f’(x)/0.8, f(x)/2.2} {-\infty,-2,3,+\infty} \tkzTabLine{ ,-,0,+,0,-, } \tkzTabVar{+/+\infty,-/1,+/4,-/-\infty} \end{tikzpicture} \end{center} Hàm số đồng biến trên khoảng nào?
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho hàm số y=f(x) có bảng biến thiên như hình vẽ. \begin{center} \begin{tikzpicture} \tkzTabInit[lgt=1.2,espcl=3] {x/0.8, f’(x)/0.8, f(x)/2.2} {-2,-1,1,3} \tkzTabLine{ ,+,0,-,t,+, } \tkzTabVar{-/0,+/1,-/-2,+/5} \end{tikzpicture} \end{center} Khẳng định nào \textbf{sai}?
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho hàm số y=f(x) có bảng biến thiên như hình vẽ. Khẳng định nào đúng? \begin{center} \begin{tikzpicture} \tkzTabInit[lgt=1.2,espcl=3] {x/0.8,f’(x)/0.8,f(x)/2.2} {-\infty,2,+\infty} \tkzTabLine{ ,+,d,+,} \tkzTabVar{-/1,+D-/+\infty/-\infty,+/1} \end{tikzpicture} \end{center}
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho hàm số y=f(x) có bảng xét dấu đạo hàm như hình dưới. Mệnh đề nào đúng? \begin{center} \begin{tikzpicture} \tkzTabInit[lgt=1.2,espcl = 2.5] {x /1, y' /1} {-\infty,-1,0, 2 ,+\infty} \tkzTabLine{ ,+,0,-,d,-,0,+, } \end{tikzpicture} \end{center}
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho hàm số y=f(x) có đồ thị như hình bên. Hàm số đã cho đồng biến trên khoảng nào? \begin{center} \begin{tikzpicture}[line join=round, line cap=round,>=stealth,thick,scale=0.8] \tikzset{label style/.style={font=\footnotesize}} \draw[->] (-2.1,0)--(4.1,0) node[below left] {x}; \draw[->] (0,-3.1)--(0,3.1) node[below left] {y}; \draw (0,0) node [below left] {O}; \foreach \x in {1,3} \draw[thin] (\x,1pt)--(\x,-1pt) node [below] {\x}; \foreach \x in {-1,2} \draw[thin] (\x,1pt)--(\x,-1pt) node [above] {\x}; \foreach \y in {-2,2} \draw[thin] (1pt,\y)--(-1pt,\y) node [above right] {\y}; \draw[dashed,thin](-1,0)--(-1,-2)--(0,-2); \draw[dashed,thin](2,0)--(2,-2)--(0,-2); \draw[dashed,thin](3,0)--(3,2)--(0,2); \begin{scope} \clip (-2,-3) rectangle (4,3); \draw[samples=200,domain=-2:4,smooth,variable=\x] plot (\x,{1*((\x)^3)+-3*((\x)^2)+0*(\x)+2}); \end{scope} \end{tikzpicture} \end{center}
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