A.\(50\)               
B.\(15\)                
C.\(35\)               
D.\(0\)

A.\(3\)         
B.\({a^3}\)            
C.\(a\)        
D.\(\dfrac{1}{3}\)

A.\(x - y - 2{\rm{z}} + 5 = 0\)
B.\(x + y - 2{\rm{z}} + 5 = 0\)
C.\(x + y - 2z - 5 = 0\)
D.\(2x - y + 3{\rm{z}} + 5 = 0\)

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

A.\(z = 3 - 5i\)  
B.\(z =  - 3 - 5i\)   
C.\(z = 3 + 5i\)   
D.\(z =  - 3 + 5i\)

A.\(1\)   
B.\(3{\rm{e}}\)    
C.\(e\)    
D.\(\ln 3\)

A.\({2^{10}}C_{15}^6\)  
B.\({2^9}C_{15}^6\) 
C.\({2^9}C_{15}^5\) 
D.\({2^{10}}C_{15}^5\)

A.\( - 5\)   
B.\(\dfrac{{ - 9}}{4}\)    
C.\( - 6\)    
D.\(\dfrac{{ - 25}}{4}\)

A.\({120^o}\)  
B.\({90^o}\)    
C.\({30^o}\)    
D.\({60^o}\)

A.\(\dfrac{{x + 3}}{2} = \dfrac{{y - 5}}{3} = \dfrac{{z - 6}}{4}\)   
B.\(\dfrac{{x + 3}}{2} = \dfrac{{y - 5}}{{ - 3}} = \dfrac{{z - 6}}{4}\)  
C.\(\dfrac{{x - 3}}{2} = \dfrac{{y + 5}}{{ - 3}} = \dfrac{{z + 6}}{4}\) 
D.\(\dfrac{{x + 3}}{2} = \dfrac{{y - 5}}{{ - 3}} = \dfrac{{z - 6}}{{ - 4}}\)