A.\(\pi {R^2}h\)
B.\(\dfrac{1}{3}\pi {R^2}h\)
C.\(2\pi {R^2}h\)
D.\(2\pi Rh\)

A.\(3{a^3}\)
B.\({a^3}\) 
C.\(\dfrac{{{a^3}}}{4}\)
D.\(\dfrac{{3{a^3}}}{4}\)

A.\(V = \dfrac{1}{3}Bh\)
B.\(V = Bh\)
C.\(V = \dfrac{1}{2}Bh\)
D.\(V = \dfrac{1}{6}Bh\)

A.\(z =  - 4 + 3i\)
B.\(z =  - 3 + 4i\)
C.\(z = 3 - 4i\)
D.\(z = 3 + 4i\)

A.\( - 5 + 5i\)
B.\( - 5i\)
C.\(5 - 5i\)
D.\( - 1 + i\)

A.\(7\) và \(\sqrt 5 \)
B.\( - 7\) và \(\sqrt 5 \)
C.\(7\) và \(i\sqrt 5 \)
D.\(7\) và \( - \sqrt 5 \)

A.\(32\)
B.\(34\)
C.\(42\) 
D.\(46\)

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.\(\dfrac{x}{3} + \dfrac{y}{1} + \dfrac{z}{{ - 2}} = 1\)
B.\(\dfrac{x}{1} + \dfrac{y}{{ - 2}} + \dfrac{z}{3} = 0\)
C.\(\dfrac{x}{{ - 2}} + \dfrac{y}{1} + \dfrac{z}{3} = 1\)
D.\(\dfrac{x}{1} + \dfrac{y}{{ - 2}} + \dfrac{z}{3} = 1\)

A.\(\overrightarrow m  = \left( {1; - 4;2} \right)\)
B.\(\overrightarrow u  = \left( {1;2;2} \right)\)
C.\(\overrightarrow v  = \left( { - 3;4; - 2} \right)\) 
D.\(\overrightarrow n  = \left( {1;2;6} \right)\)