A.2
B.3
C.4
D.0

A.\(I =  - 12\)
B.\(I = 8\)
C.\(I = 12\)
D.\(I =  - 8\)

A.\(\left\{ \begin{array}{l}x =  - 3\\y =  - 5 - t\\z =  - 3 + 4t\end{array} \right.\)
B.\(\left\{ \begin{array}{l}x =  - 3\\y =  - 5 + t\\z = 3 + 4t\end{array} \right.\)
C.\(\left\{ \begin{array}{l}x =  - 3\\y =  - 5 + 2t\\z = 3 - t\end{array} \right.\)
D.\(\left\{ \begin{array}{l}x =  - 3\\y =  - 6 - t\\z = 7 + 4t\end{array} \right.\)

A.\(V = \dfrac{{\sqrt 6 {a^3}}}{{18}}\)
B.\(V = \sqrt 3 {a^3}\)
C.\(V = \dfrac{{\sqrt 6 {a^3}}}{3}\)
D.\(V = \dfrac{{\sqrt 3 {a^3}}}{3}\)

A.2
B.1
C.3
D.4

A.\(V = 32 + 2\sqrt {15} \)
B.\(V = \dfrac{{124\pi }}{3}\)
C.\(V = \dfrac{{124}}{3}\)
D.\(V = \left( {32 + 2\sqrt {15} } \right)\pi \)

A.\(P =  - 5 + 3\sqrt 3 \)
B.\(P =  - 1 + \sqrt 3 \)
C.\(P =  - 1 - \sqrt 3 \)
D.\(P =  - 5 - 3\sqrt 3 \)

A.Hình 1
B.Hình 2
C.Hình 3
D.Hình 4

A.\(1 \le m \le 3\)
B.\(m \le 1\)
C.\(m \ge 1\)
D.\(1 < m \le 3\)

A.\(\mathop {\min }\limits_{\left( {0; + \infty } \right)} y = 3\sqrt[3]{9}\)
B.\(\mathop {\min }\limits_{\left( {0; + \infty } \right)} y = 7\)
C.\(\mathop {\min }\limits_{\left( {0; + \infty } \right)} y = \dfrac{{33}}{5}\)
D.\(\mathop {\min }\limits_{\left( {0; + \infty } \right)} y = 2\sqrt[3]{9}\)