A.\(\int {f\left( x \right)dx}  =  - \cos 2x + C\)
B.\(\int {f\left( x \right)dx}  = \dfrac{1}{2}\cos 2x + C\)
C.\(\int {f\left( x \right)dx}  = \cos 2x + C\)   
D.\(\int {f\left( x \right)dx}  =  - \dfrac{1}{2}\cos 2x + C\)

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

A.2
B.-2
C.3
D.-3

A.27
B.36
C.24
D.16

A.\(x - 2y + 5 = 0\)
B.\(2x - y - 3 = 0\)
C.\(2x - y + 1 = 0\)
D.\(2x + y - 5 = 0\)

A.\(\left( { - 1;2} \right)\)
B.\(\left( {2; + \infty } \right)\)
C.\(\left( { - 2;2} \right)\)
D.\(\left( { - \infty ; - 2} \right)\)

A.\(\dfrac{2}{3}\)
B.8
C.6
D.9

A.1
B.3
C.-1
D.#NAME?

A.\(32\pi \)
B.\(\dfrac{{32}}{3}\pi \)
C.\(\dfrac{{16}}{3}\pi \)
D.\(16\pi \)

A.\(\overrightarrow u  = \left( {1;1; - 3} \right)\)
B.\(\overrightarrow u  = \left( {1;1;2} \right)\)     
C.\(\overrightarrow u  = \left( {1; - 3;2} \right)\)
D.\(\overrightarrow u  = \left( {3;1;1} \right)\)