A.\(T = \left( {2;4} \right)\)
B.\(T = \left[ {2;2\sqrt 5 } \right]\)
C.\(T = \left[ {2;4} \right]\)
D.\(T = \left[ {2\sqrt 2 ;4} \right]\)

A.\(\pi 8\sqrt 2 {a^3}\)
B.\(\pi 3\sqrt 2 {a^3}\)
C.\(\dfrac{{2\sqrt 2 \pi {a^3}}}{3}\)
D.\(\pi 2\sqrt 2 {a^3}\)

A.\(m =  - 2\)
B.\(m =  - 3\)
C.\(m =  - 1\)
D.\(m = 1\)

A.\(\dfrac{{7\pi }}{5}\)
B.\(\dfrac{{6\pi }}{5}\)
C.\(\dfrac{{8\pi }}{5}\)
D.\(\pi \)

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

A.\(H\left( {\dfrac{5}{2};4; - 5} \right)\)
B.\(H\left( {1;4; - 5} \right)\)
C.\(H\left( {2;3; - 6} \right)\)
D.\(H\left( {\dfrac{7}{3};\dfrac{{11}}{3}; - \dfrac{{16}}{3}} \right)\)

A.\(S = 28\)
B.\(S = \dfrac{{49}}{2}\)
C.\(S = 7\)
D.\(S = 14\)

A.\(2\)
B.\(0\)
C.\(3\)
D.\(1\)

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

A.\(2\sqrt 2 \pi {a^3}\)
B.\(12\pi {a^3}\)
C.\(36\pi {a^3}\)
D.\(\dfrac{{2\sqrt 2 \pi }}{3}{a^3}\)