2^(x+4) - 2^(x+1)/2^x+2÷2 = ?  

A    4

B    2

C    6

D    8

Solution

Correct Answer: Option A

 

Sol: 2(x+4)-4.2(x+1)/2x+2÷2 = 2(x+4)-4.2(x+1)/2x+2-1 =2(x+1 + 3)-4.2(x+1)/2x+1 =2(x+1)..23-4.2(x+1)/2x+1 =2(x+1)  {8-4} /2x+1 =8-4 =4

 

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