If n is a number such that (-8)2n = 28+2n, then  n=

A    3/2

B    -2

C    4

D    5 

Solution

Correct Answer: Option B

 

(-8)2n = 28 - 2n

or, -16n = 28 - 2n

or, - 16n + 2n = 28

or, - 14n = 28

or, n = -2

 

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