A.\(10\pi \)                    
B.10                    
C.\(5\pi \)                          
D.5

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

A.\({\left( {x + 2} \right)^2} + {\left( {y - 5} \right)^2} + {\left( {z - 1} \right)^2} = 16\)  
B.\({\left( {x + 2} \right)^2} + {\left( {y - 5} \right)^2} + {\left( {z - 1} \right)^2} = 4\)
C.\({\left( {x + 2} \right)^2} + {\left( {y - 5} \right)^2} + {\left( {z - 1} \right)^2} = \dfrac{{25}}{9}\)
D.\({\left( {x - 2} \right)^{^2}} + {\left( {y + 5} \right)^2} + {\left( {z + 1} \right)^2} = 16\)

A.2                   
B.1                    
C.3                         
D.4

A.\(\sqrt {11}  - \sqrt 5 \)                    
B.6                   
C.\(\sqrt 5  - \sqrt {11} \)                          
D.3

A.\(x - 5y - z + 18 = 0\)  
B.\(x - 5y + z - 22 = 0\)
C.\(x + 5y - z + 18 = 0\)  
D.\(x + 3y - z + 12 = 0\)

A.\(( - 1;1).\)
B.\(( - 3;1)\)
C.\((1;3).\)
D.\(( - 1;3).\)

A.\(78\pi \)
B.\(650\pi \) 
C.\(325\pi \) 
D.\(39\pi \)

A.2 
B.0  
C.4  
D.6

A.what you have done
B.that you have done
C.what have you done
D.whether have you done