A.\(4\pi rl.\)           
B.  \(\pi rl.\)              
C.\(\frac{1}{3}\pi rl.\)    
D.\(2\pi rl.\)

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

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

A.\(y =  - 2.\)        
B.\(y = 1.\)                       
C.\(x =  - 1.\)         
D.\(x = 2.\)

A.\(\left( {10; + \infty } \right).\)                     
B.\(\left( {0; + \infty } \right)\).
C.\(\left[ {10; + \infty } \right.).\)              
D.\(\left( { - \infty ;10} \right).\)

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

A.\(16.\)                      
B.\(4.\)                    
C.\(2.\)                  
D.\(8.\)

A.\(\overline z  =  - 2 + i.\)                  
B.\(\overline z  =  - 2 - i.\) 
C.\(\overline z  = 2 - i.\)    
D.\(\overline z  = 2 + i.\)

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

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