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Question

Find the value of n, if

(53)2n+1×(53)5=(53)n+2.

A
n=4
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B
n=1
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C
n=4
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D
n=0
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Solution

The correct option is C n=4
By the Laws of exponents , we know that am×an=am+n

(53)2n+1×(53)5=(53)2n+1+5

(53)2n+6=(53)n+2

Since the bases are same, we can equate the powers.

2n+6=n+22nn=26n=4

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