A. \(20\).
B. \(10\).
C. \(5\).
D. \(120\).
A. \(185\).
B. \(255\).
C. \(480\).
D. \(250\).
A. \(\left( 2;+\infty \right)\).
B. \(\left( -3;1 \right)\).
C. \(\left( 0;2 \right)\).
D. \(\left( -\infty ;2 \right)\).
A. \(x=-1\).
B. \(x=1\).
C. \(x=2\).
D. \(x=-2\).
A. 1
B. 2
C. 3
D. 4
A. \(y=1\).
B. \(y=-1\).
C. \(y=3\).
D. \(y=-3\).
A. \(y={{x}^{3}}-3x+1\).
B. \(y=-{{x}^{3}}+3{{x}^{2}}+1\).
C. \(y={{x}^{3}}+3x+1\).
D. \(y={{x}^{3}}-3{{x}^{2}}+1\).
A. 0
B. \(-1\).
C. 2
D. \(-2\).
A. \(P=\frac{{{x}^{3}}}{{{y}^{5}}}\).
B. \(P={{x}^{3}}-{{y}^{5}}\).
C. \(P=15xy\).
D. \(P=3x-5y\).
A. \({y}'={{a}^{x}}.\ln a\).
B. \({y}'={{a}^{x}}\).
C. \({y}'=\frac{{{a}^{x}}}{\ln a}\).
D. \({y}'=x.{{a}^{x-1}}\).
A. \({{a}^{\frac{2}{3}}}\).
B. \({{a}^{\frac{3}{2}}}\).
C. \({{a}^{6}}\).
D. \({{a}^{\frac{1}{6}}}\).
A. \(x=\frac{1}{2}\).
B. \(x=\frac{3}{2}\).
C. \(x=-\frac{1}{2}\).
D. \(x=-\frac{3}{2}\).
A. \(x=\frac{27}{2}\).
B. \(x=\frac{81}{2}\).
C. \(x=32\).
D. \(x=3\).
A. \(\int{f\left( x \right)dx=\frac{2}{3}{{x}^{3}}-3x+C}\).
B. \(\int{f\left( x \right)dx=\frac{2}{3}{{x}^{3}}-3+C}\)
C. \(\int{f\left( x \right)dx=\frac{2}{3}{{x}^{3}}+3x+C}\).
D. \(\int{f\left( x \right)dx=\frac{2}{3}{{x}^{3}}+C}\).
A. \(\int{f\left( x \right)dx=3\cos 3x+C}\).
B. \(\int{f\left( x \right)dx=\frac{1}{3}\cos 3x+C}\).
C. \(\int{f\left( x \right)dx=-\frac{1}{3}\cos 3x+C}\).
D. \(\int{f\left( x \right)dx=-3\cos 3x+C}\).
A. 14
B. - 4
C. 8
D. 2
A. \(\frac{\sqrt{2}}{2}-1\).
B. \(\frac{\sqrt{2}}{2}\).
C. \(-\frac{\sqrt{2}}{2}\).
D. \(1-\frac{\sqrt{2}}{2}\).
A. 5
B. 25
C. 7
D. 1
A. 2
B. 2i
C. -2i
D. -2
A. \({{z}_{3}}=3+2i\).
B. \({{z}_{3}}=\frac{3}{2}+i\).
C. \({{z}_{3}}=-\frac{3}{2}+2i\).
D. \({{z}_{3}}=-3+2i\).
A. \(16\pi \)(đvtt).
B. \(\dfrac{16}{3}\) (đvtt).
C. \(\frac{16}{3}\pi \) (đvtt).
D. \(8\pi \) (đvtt).
A. 27
B. 9
C. 6
D. 16
A. \(V=\pi rh\).
B. \(V=\pi {{r}^{2}}h\).
C. \(V=\frac{1}{3}\pi rh\).
D. \(V=\frac{1}{3}\pi {{r}^{2}}h\).
A. \(20\pi \,\text{c}{{\text{m}}^{2}}\).
B. \(40\pi \,\text{c}{{\text{m}}^{2}}\).
C. \(80\pi \,\text{c}{{\text{m}}^{2}}\).
D. \(10\pi \,\text{c}{{\text{m}}^{2}}\).
A. \(G\left( 0\,;\,-3\,;\,-3 \right)\).
B. \(G\left( 0\,;\,-1\,;\,-1 \right)\).
C. \(G\left( 6\,;\,-3\,;\,-3 \right)\).
D. \(G\left( 2\,;\,-1\,;\,-1 \right)\).
A. \(I\left( 2\,;\,-4\,;\,6 \right)\).
B. \(I\left( -2\,;\,4\,;\,-6 \right)\).
C. \(I\left( 1\,;\,-2\,;\,3 \right)\).
D. \(I\left( -1\,;\,2\,;\,-3 \right)\).
A. \(N\left( 4\,;\,-1\,;\,1 \right)\).
B. \(M\left( 2\,;\,-3\,;\,-1 \right)\).
C. \(P\left( 0\,;\,-5\,;\,-1 \right)\).
D. \(Q\left( -2\,;\,3\,;\,11 \right)\).
A. \(\overrightarrow{{{u}_{1}}}=\left( 1;-4;0 \right)\).
B. \(\overrightarrow{{{u}_{2}}}=\left( -4;-2;1 \right)\).
C. \(\overrightarrow{{{u}_{3}}}=\left( 2;2;1 \right)\).
D. \(\overrightarrow{{{u}_{4}}}=\left( 1;4;0 \right)\).
A. \(\frac{7}{18}\).
B. \(\frac{5}{18}\).
C. \(\frac{5}{9}\).
D. \(\frac{7}{9}\).
A. \(-2\).
B. \(-1\).
C. 1
D. 2
A. \(y=\frac{x+1}{2-x}\).
B. \(y=-{{x}^{3}}-3x+2021\ \).
C. \(y={{x}^{3}}-2{{x}^{2}}+x+2021\).
D. \(y=-2{{x}^{4}}+4{{x}^{2}}-2021\).
A. \(3\sqrt{2}-3\).
B. \(2\sqrt{2}-5\).
C. \(3\sqrt{3}-5\).
D. \(3\sqrt{3}-3\).
A. \(T=\left( -\infty ;\ -\frac{7}{2} \right)\cup \left[ 1;\ +\infty \right)\)
B. \(T=\left( -\infty ;\ -\frac{9}{2} \right)\cup \left( 1;\ +\infty \right)\)
C. \(T=\left[ -\frac{9}{2};\ 1 \right]\).
D. \(T=\left( -\frac{9}{2};\ 1 \right)\).
A. i
B. 1
C. -1
D. 4
A. \(\sqrt{3}\)
B. \(\frac{\sqrt{15}}{5}\).
C. \(\sqrt{2}\).
D. 1
A. \(\frac{\sqrt{3}a}{2}\).
B. a
C. \(\sqrt{3}a\).
D. 2a
A. \({{x}^{2}}+{{y}^{2}}+{{z}^{2}}+4x-6y+2z-22=0\).
B. \({{x}^{2}}+{{y}^{2}}+{{z}^{2}}-4x+6y-2z-22=0\).
C. \({{x}^{2}}+{{y}^{2}}+{{z}^{2}}+12x+2y+6z-10=0\).
D. \({{x}^{2}}+{{y}^{2}}+{{z}^{2}}-12x-2y-6z-10=0\).
A. \(\left\{ {\begin{array}{*{20}{l}} {x = - 1 + 6t}\\ {y = 1 + 3t}\\ {z = 3 - 2t} \end{array}} \right.\)
B. \(\left\{ {\begin{array}{*{20}{l}} {x = 1 + 6t}\\ {y = - 1 + 3t}\\ {z = - 3 - 2t} \end{array}} \right.\)
C. \(\left\{ {\begin{array}{*{20}{l}} {x = 6 - t}\\ {y = 3 + t}\\ {z = - 2 + 3t} \end{array}} \right.\)
D. \(\left\{ {\begin{array}{*{20}{l}} {x = - 6 - t}\\ {y = - 3 + t}\\ {z = 2 + 3t} \end{array}} \right.\)
A. \(f\left( 0 \right)\) và \(f\left( 4 \right)-8\).
B. \(f\left( 0 \right)\) và \(f\left( -1 \right)-2\).
C. \(f\left( 4 \right)-8\) và \(f\left( 1 \right)-2\).
D. \(f\left( 16 \right)-32\) và \(f\left( -1 \right)-2\).
A. \(m={{3}^{10}}-2\)
B. \(m={{3}^{5}}-2\).
C. \(m={{3}^{15}}-2\)
D. \(m={{3}^{20}}-2\).
A. \(15+\frac{1}{2}\ln 6\).
B. \(15-\frac{1}{5}\ln 6\).
C. \(15+\frac{1}{5}\ln 6\).
D. \(15-\frac{1}{2}\ln 6\).
A. 1
B. 0
C. 2
D. 4
A. \(\frac{8{{a}^{3}}}{9}\).
B. \(\frac{8{{a}^{3}}}{3}\).
C. \(\frac{\sqrt{3}{{a}^{3}}}{12}\).
D. \(\frac{4{{a}^{3}}}{9}\).
A. \(7,568,000\).
B. \(10,405,000\).
C. \(9,977,000\).
D. \(8,124,000\).
A. \(\left\{ \begin{array}{l} x = 1 + 18t\\ y = 2 - 3t\\ z = - 1 + t \end{array} \right.\)
B. \(\left\{ \begin{array}{l} x = - 17 + 18t\\ y = 5 + 3t\\ z = t \end{array} \right.\)
C. \(\left\{ \begin{array}{l} x = 1 - 18t\\ y = 2 - 3t\\ z = - 1 + t \end{array} \right.\)
D. \(\left\{ \begin{array}{l} x = - 17 + 18t\\ y = 5 - 3t\\ z = - \,t \end{array} \right.\)
A. 3
B. 5
C. 7
D. 6
A. 12
B. 6
C. 7
D. 8
A. 6
B. 10
C. 18
D. 34
A. \(\left( \sqrt{3};0;0 \right)\).
B. \(\left( \sqrt{3};\sqrt{3};0 \right)\).
C. \(\left( \sqrt{3};2;1 \right)\).
D. \(\left( \sqrt{3};\sqrt{2};\sqrt{3} \right)\).
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