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if f(x)=log5 log3 x then f'(e) is equal ...

if `f(x)=log_5 log_3 x` then `f'(e)` is equal to

A

`e log _(e) 5`

B

`e log _(e) 3`

C

`(1)/( elog _(e) 5)`

D

`(1)/( e log _(e) 3)`

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The correct Answer is:
C
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