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

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

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

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

A.\(\sqrt {13} \)  
B.\(13\)  
C.\(5\)  
D.\(\sqrt 5 \)

A.\(\left( {1;2} \right)\)
B.\(\left( {1;2} \right]\)
C.\(\left( { - \infty ;2} \right]\)
D.\(\left[ {2; + \infty } \right)\)

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

A.\(y =  - \cos 3x + C\)  
B.\(y =  - \dfrac{1}{3}\cos 3x + C\)  
C.\(y = \cos 3x + C\)  
D.\(y = \dfrac{1}{3}\cos 3x + C\)

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

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