A. \(C_{13}^2\)
B. \(A_{13}^2\)
C. 13
D. \(C_5^2 + C_8^2\)
A. q = 21
B. \(q = \pm 4\)
C. q = 4
D. \(q = 2\sqrt 2 \)
A. \(\left( { - \infty ; - 1} \right)\)
B. (-1;4)
C. (-1;2)
D. \(\left( {3; + \infty } \right)\)
A. 4
B. 1
C. 2
D. 3
A. x = 2
B. x = -2
C. x = 3
D. x = -3
A. \(y = - {x^4} + 2{x^2} + 1\)
B. \(y = - {x^3} - 3{x^2} + 1\)
C. \(y = {x^3} - 3{x^2} + 1\)
D. \(y = {x^4} - 2{x^2} + 1\)
A. x = 1
B. x = -5
C. x = 5
D. x = -1
A. \(2 - {\log _a}b\)
B. \(2 + {\log _a}b\)
C. \(1 + 2{\log _a}b\)
D. \(2{\log _a}b\)
A. \(y' = \frac{{x{{.2}^{1 + {x^2}}}}}{{\ln 2}}\)
B. \(y' = x{.2^{1 + {x^2}}}.\ln 2\)
C. \(y' = {2^x}.\ln {2^x}.\)
D. \(y' = \frac{{x{{.2}^{1 + x}}}}{{\ln 2}}\)
A. \({a^{\frac{5}{6}}}\)
B. a5
C. \({a^{\frac{2}{3}}}\)
D. \({a^{\frac{7}{6}}}\)
A. x = 2
B. x = -4
C. x = 4
D. \(x = \frac{7}{2}\)
A. \(\int f (x){\rm{d}}x = {x^4} - \frac{1}{3}\cos 3x + C\)
B. \(\int f (x){\rm{d}}x = {x^4} + \frac{1}{3}\cos 3x + C\)
C. \(\int f (x){\rm{d}}x = {x^4} - 3\cos 3x + C\)
D. \(\int f (x){\rm{d}}x = {x^4} + 3\cos 3x + C\)
A. \(\int f (x){\rm{d}}x = 6x + {e^x} + C\)
B. \(\int f (x){\rm{d}}x = {x^3} + {e^x} + C\)
C. \(\int f (x){\rm{d}}x = 6x - {e^x} + C\)
D. \(\int f (x){\rm{d}}x = {x^3} - {e^x} + C\)
A. 2
B. 6
C. 8
D. 4
A. I = 5
B. I = 6
C. I = 2
D. I = 4
A. 12
B. -12
C. 1
D. -1
A. Q(1;2)
B. M(1;-2)
C. N(2;1)
D. P(-2;1)
A. 8
B. 24
C. 12
D. 4
A. \(36\pi \)
B. \(27\pi \)
C. \(288\pi \)
D. \(\frac{4}{3}\pi \)
A. \({S_{tp}} = 2\pi r + \pi rl\)
B. \({S_{tp}} = 2\pi rl\)
C. \({S_{tp}} = \pi {r^2} + \pi rl\)
D. \({S_{tp}} = \pi {r^2} + 2\pi r\)
A. \(4\pi + 4\)
B. \(8\pi \)
C. \(4{\pi ^2} + 4\pi \)
D. \(16\pi \)
A. (2;2;2)
B. (2;2;-4)
C. (2;2;-2)
D. (2;3;1)
A. \((2\,;\,4\,;\, - 2)\)
B. \((1\,;\,2\,;\,1)\)
C. \((1\,;\,2\,; - 1)\)
D. \(( - 1\,;\, - 2\,;\,1)\)
A. \(\left( {{P_1}} \right):3x + 2y + z = 0\)
B. \(\left( {{P_2}} \right):x + 2y + 3z - 1 = 0\)
C. \(\left( {{P_3}} \right):x + 2y + 3z = 0\)
D. \(\left( {{P_4}} \right):x + 2y + 3z - 1 = 0\)
A. \({\vec u_1} = (1\,;\,1\,;\,1)\)
B. \({\vec u_2} = (1\,;\, - 2\,;\,1)\)
C. \({\vec u_3} = (1\,;\,0\,;\, - 1)\)
D. \({\vec u_4} = (1\,;\,3\,;\,1)\)
A. \(\frac{1}{{26}}\)
B. \(\frac{1}{{13}}\)
C. \(\frac{1}{{52}}\)
D. \(\frac{1}{4}\)
A. \(y = \frac{{2x + 1}}{{x - 2}}\)
B. \(y = - {x^2} + 2x\)
C. \(y = - {x^3} + {x^2} - x\)
D. \(y = - {x^4} - 3{x^2} + 2\)
A. 18
B. 21
C. -3
D. 15
A. \(\left[ { - \sqrt 5 \,;\,\sqrt 5 } \right].\)
B. [-1;1]
C. \(\left[ {1\,; + \infty } \right)\)
D. \(\left( { - \infty \,;\, - 1} \right]\)
A. 1
B. 3
C. 2
D. 4
A. \(\sqrt {10} \)
B. 5
C. 10
D. \(\sqrt {5} \)
A. 30o
B. 45o
C. 60o
D. 90o
A. \(\sqrt {17} \)
B. \(\sqrt {21} \)
C. 3
D. 1
A. \({x^2} + {y^2} + {z^2} = 3\)
B. \({x^2} + {y^2} + {z^2} = 9\)
C. \({x^2} + {\left( {y - 3} \right)^2} + {z^2} = 3\)
D. \({x^2} + {\left( {y - 3} \right)^2} + {z^2} = 9\)
A. \(\left\{ \begin{array}{l} x = 2 - t\\ y = 3 - 4t\\ z = - 1 + 3t \end{array} \right.\)
B. \(\left\{ \begin{array}{l} x = 2 + t\\ y = 3 - t\\ z = - 1 + 2t \end{array} \right.\)
C. \(\left\{ \begin{array}{l} x = 1 + 2t\\ y = - 1 + 3t\\ z = 2 - t \end{array} \right.\)
D. \(\left\{ \begin{array}{l} x = 2 + 3t\\ y = 3 - 2t\\ z = - 1 + t \end{array} \right.\)
A. f(1) - 1
B. f(-1) + 1
C. \(f\left( {\frac{1}{2}} \right) - \frac{1}{2}\)
D. f(0)
A. 28
B. 29
C. 30
D. 31
A. \(\ln \frac{4}{3}\)
B. \(\ln \frac{3}{4}\)
C. ln3
D. 0
A. -3
B. -1
C. 2
D. 1
A. \(\frac{{{a^3}\sqrt 3 }}{2}\)
B. \(\frac{{{a^3}\sqrt 3 }}{6}\)
C. \({a^3}\sqrt 3 \)
D. \(\frac{{{a^3}\sqrt 2 }}{3}\)
A. \(495\pi \left( {{\rm{c}}{{\rm{m}}^3}} \right)\)
B. \(462\pi \left( {{\rm{c}}{{\rm{m}}^3}} \right)\)
C. \(490\pi \left( {{\rm{c}}{{\rm{m}}^3}} \right)\)
D. \(412\pi \left( {{\rm{c}}{{\rm{m}}^3}} \right)\)
A. \(\left\{ {\begin{array}{*{20}{l}} {x = - 1 + t}\\ {y = - 4t}\\ {z = - 3t} \end{array}} \right..\)
B. \(\left\{ {\begin{array}{*{20}{l}} {x = 3 + t}\\ {y = - 2 + 4t}\\ {z = 2 + t} \end{array}} \right..\)
C. \(\left\{ {\begin{array}{*{20}{l}} {x = 3 + t}\\ {y = - 2 - 4t}\\ {z = 2 - 3t} \end{array}} \right..\)
D. \(\left\{ {\begin{array}{*{20}{l}} {x = 3 + 2t}\\ {y = - 2 + 6t}\\ {z = 2 + t} \end{array}} \right..\)
A. \(T \in \left( {0\,;\,80} \right)\)
B. \(T \in \left( {80\,;\,500} \right)\)
C. \(T \in \left( {500\,;\,1000} \right)\)
D. \(T \in \left( {1000\,;\,2000} \right)\)
A. \({m_0} \in \left( {\frac{1}{2}\,;\,\frac{2}{3}} \right)\)
B. \({m_0} \in \left( {\frac{2}{3}\,;\,\frac{7}{6}} \right)\)
C. \({m_0} \in \left( {\frac{7}{6}\,;\,\frac{5}{4}} \right)\)
D. \({m_0} \in \left( {\frac{5}{4}\,;\,\frac{3}{2}} \right)\)
A. 6
B. 9
C. 12
D. 15
A. \(S \in \left( {0\,;\,1} \right)\)
B. \(S \in \left( {1\,;\,2} \right)\)
C. \(S \in \left( {2\,;\,3} \right)\)
D. \(S \in \left( {3\,;\,4} \right)\)
Lời giải có ở chi tiết câu hỏi nhé! (click chuột vào câu hỏi).
Copyright © 2021 HOCTAPSGK