A.\(m \in \left( { - \infty ;0} \right)\)
B.\(m \in \left( { - \dfrac{1}{4}; + \infty } \right)\backslash \left\{ 0 \right\}\)
C.\(m \in \left( {0; + \infty } \right)\)  
D.\(m = 0\)

A.5
B.7
C.4
D.3

A.\(16\)
B.\(8\)  
C.\(2\)  
D.\(4\)

A.7
B.6
C.4
D.5

A.\({S_{xq}} = 9\pi \)
B.\({S_{xq}} = \dfrac{{9\pi }}{2}\)
C.\({S_{xq}} = \dfrac{{9\sqrt 2 \pi }}{4}\)  
D.\({S_{xq}} = \dfrac{{9\pi \sqrt 2 }}{2}\)

A.2
B.\(\dfrac{1}{2}\)  
C.3
D.\(\dfrac{1}{3}\)

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

A.\(\overrightarrow {{u_1}}  = \left( {0; - 1; - 2} \right)\)
B.\(\overrightarrow {{u_2}}  = \left( {2; - 1;0} \right)\)
C.\(\overrightarrow {{u_3}}  = \left( { - 1;0;1} \right)\)  
D.\(\overrightarrow {{u_4}}  = \left( { - 1;1; - 1} \right)\)

A.\( - 101376\)
B.25344.  
C.101376.  
D.\( - 25344\)

A.\(2.\)
B.\(4.\)  
C.\(3.\)  
D.\(1.\)