A.\(S = \dfrac{7}{3}\)B.\(S = - 5\)C.\(S = 5\)D.\(S = - \dfrac{7}{3}\)
A.13 năm B.14 nămC.12 nămD.11 năm
A.\(\left\{ \begin{array}{l}x = - 1 - t\\y = 1 + t\\z = 1 + 3t\end{array} \right.\)B.\(\left\{ \begin{array}{l}x = - t\\y = 1 + t\\z = 3 + t\end{array} \right.\)C.\(\left\{ \begin{array}{l}x = - 1 - t\\y = 1 - t\\z = 3 + t\end{array} \right.\)D.\(\left\{ \begin{array}{l}x = - 1 - t\\y = 1 + t\\z = 3 + t\end{array} \right.\)
A.\(m < - 1\)B.\(3 < m \le 4\)C.\(m > 4\)D.\(1 \le m < 3\)
A.\(\int {f'(x){e^{2x}}dx} = - {x^2} + 2x + C\)B.\(\int {f'(x){e^{2x}}dx} = - {x^2} + x + C\)C.\(\int {f'(x){e^{2x}}dx} = 2{x^2} - 2x + C\)D.\(\int {f'(x){e^{2x}}dx} = - 2{x^2} + 2x + C\)
A.\(V = \dfrac{{\pi {a^3}}}{2}\)B.\(V = \dfrac{{\sqrt 2 \pi {a^3}}}{6}\)C.\(V = \dfrac{{\pi {a^3}}}{6}\)D.\(V = \dfrac{{\sqrt 2 \pi {a^3}}}{2}\)
A.\(Q(1;2)\)B.\(N(2;1)\)C.\(M(1; - 2)\)D.\(P( - 2;1)\)
A.\({(x - 1)^2} + {y^2} + {z^2} = 13\)B.\({(x + 1)^2} + {y^2} + {z^2} = 13\)C.\({(x - 1)^2} + {y^2} + {z^2} = \sqrt {13} \)D.\({(x + 1)^2} + {y^2} + {z^2} = 17\)
A.\(y' > 0,\forall x \in \mathbb{R}\)B.\(y' < 0,\forall x \in \mathbb{R}\)C.\(y' > 0,\forall x \ne 1\)D.\(y' < 0,\forall x \ne 1\)
A.\(f(x) = 3x + 5\cos x + 5\)B.\(f(x) = 3x + 5\cos x + 2\)C.\(f(x) = 3x - 5\cos x + 2\)D.\(f(x) = 3x - 5\cos x + 15\)
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