A.12
B.6
C.-12
D.-6

A.\({x^2} + {y^2} + {z^2} = 9\)  
B.\({x^2} + {y^2} + {z^2} = \sqrt 3 \)
C.\({x^2} + {y^2} + {z^2} = 3\)
D.\({x^2} + {y^2} + {z^2} = \dfrac{5}{3}\)

A.\(\left\{ \begin{array}{l}x =  - 1 + t\\y = 2 + 2t\\z = 3 - t\end{array} \right.\)
B.\(\left\{ \begin{array}{l}x = 1 - t\\y = 2 + 2t\\z = 1 + 3t\end{array} \right.\)
C.\(\left\{ \begin{array}{l}x =  - t\\y = 4 + 2t\\z = 2 + 3t\end{array} \right.\)
D.\(\left\{ \begin{array}{l}x = 1 + t\\y = 2 + 2t\\z =  - 1 + 3t\end{array} \right.\)

A.\(f\left( 0 \right) - 1\)
B.\(f\left( { - 3} \right) - 4\)
C.\(2f\left( 1 \right) - 4\)
D.\(f\left( 3 \right) - 16\)

A.6
B.7
C.5
D.8

A.\(\dfrac{{50}}{3}\)                               
B.\(\dfrac{{13}}{6}\)
C.\(\dfrac{{19}}{{24}}\)
D.\(\dfrac{{11}}{6}\)

A.0
B.2
C.4
D.1

A.\(2{a^3}\sqrt 3 \)
B.\({a^3}\sqrt 3 \)
C.\(2{a^3}\)
D.\(3{a^3}\sqrt 3 \)

A.7.568.000
B.10.405.000
C.9.997.000
D.8.124.000

A.\(\Delta :\left\{ \begin{array}{l}x = 3\\y = 1 - t\\z = 1 + 2t\end{array} \right.\)
B.\(\Delta :\left\{ \begin{array}{l}x = 8 + 5t\\y =  - 3 - 4t\\z = 2 + t\end{array} \right.\)
C.\(\Delta :\left\{ \begin{array}{l}x = 3 + 2t\\y = 1 - t\\z = 1 - 2t\end{array} \right.\)
D.\(\Delta :\left\{ \begin{array}{l}x =  - 2 + 5t\\y = 5 - 4t\\z =  - 1 + 2t\end{array} \right.\)