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If the real valued function f(x)=(a^(x)-...

If the real valued function `f(x)=(a^(x)-1)/(x^(n)(a^(x)+1))` is even then n equals

A

2

B

`(2)/(3)`

C

`(1)/(4)`

D

`-(1)/(3)`

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The correct Answer is:
D
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