A.15                             
B.5
C.\(\dfrac{5}{3}\)
D.\(\dfrac{8}{3}\)

A.\(\dfrac{8}{3}\)
B.2
C.\(\dfrac{2}{3}\)  
D.4

A.\(\dfrac{{4\pi \sqrt 3 }}{3}\)
B.\(\dfrac{{4\pi }}{3}\)
C.\(\dfrac{{2\pi \sqrt 3 }}{3}\)
D.\(4\pi \sqrt 3 \)

A.\(12\pi \)  
B.\(36\pi \)
C.12
D.36

A.\(\left( {\dfrac{3}{2};\dfrac{3}{2}; - 3} \right)\)
B.\(\left( {5; - 2; - 12} \right)\)
C.\(\left( {3;3; - 6} \right)\)
D.\(\left( {1;1; - 2} \right)\)

A.\({\left( {x - 1} \right)^2} + {\left( {y + 2} \right)^2} + {\left( {z - 3} \right)^2} = 4\)
B.\({\left( {x + 1} \right)^2} + {\left( {y - 2} \right)^2} + {\left( {z + 3} \right)^2} = 4\)
C.\({\left( {x - 1} \right)^2} + {\left( {y + 2} \right)^2} + {\left( {z - 3} \right)^2} = 2\)
D.\({\left( {x + 1} \right)^2} + {\left( {y - 2} \right)^2} + {\left( {z + 3} \right)^2} = 2\)

A.\(x = 0\)
B.\(z = 0\)
C.\(y = 0\)
D.\(x + z = 0\)

A.\(\overrightarrow u  = \left( {2;3;1} \right)\)
B.\(\overrightarrow u  = \left( {2;3;0} \right)\)
C.\(\overrightarrow u  = \left( { - 1;2; - 3} \right)\)
D.\(\overrightarrow u  = \left( {1; - 2;3} \right)\)

A.\(\dfrac{5}{{26}}\)
B.\(\dfrac{6}{{13}}\)
C.\(\dfrac{7}{{13}}\)
D.\(\dfrac{7}{{26}}\)

A.\(y = \dfrac{{x + 1}}{{x - 2}}\)  
B.\(y = 2{x^2} - x\)
C.\(y =  - {x^3} + {x^2} - x\)
D.\(y = 2{x^4} - 5{x^2} - 7\)