A.\(\dfrac{{29}}{2}\)
B.\(1\)
C.\(3\)
D.Không tồn tại

A.\(\left\{ \begin{array}{l}x = 2 + 2t\\y =  - 3t\\z =  - 1 + t\end{array} \right.\)
B.\(\left\{ \begin{array}{l}x =  - 2 + 4t\\y =  - 6t\\z = 1 + 2t\end{array} \right.\)
C.\(\left\{ \begin{array}{l}x = 4 + 2t\\y =  - 6 - 3t\\z = 2 + t\end{array} \right.\)
D.\(\left\{ \begin{array}{l}x =  - 2 + 2t\\y =  - 3t\\z = 1 + t\end{array} \right.\)

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

A.\(V = \dfrac{{8\pi {R^3}}}{3}\)
B.\(V = \dfrac{{16\pi {R^3}}}{3}\)
C.\(V = 16{R^3}\)
D.\(V = 8{R^3}\)

A.\(\left( {1;2;0} \right)\)
B.\(\left( {1;2; - 4} \right)\)
C.\(\left( {0;2; - 4} \right)\)
D.\(\left( {1;0; - 4} \right)\)

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

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

A.\(\left( {0;1;2020} \right)\)
B.\(\left( {1;1;1} \right)\)
C.\(\left( {0;2020;0} \right)\)
D.\(\left( {1;0;0} \right)\)

A.\(\dfrac{2}{5}\)
B.\(\dfrac{1}{{10}}\)
C.\(\dfrac{1}{5}\)
D.\(\dfrac{1}{4}\)

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