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Derivative of f(x) = log(5)(log(7)x), wh...

Derivative of `f(x) = log_(5)(log_(7)x)`, where `x gt 7` is

A

`1/(x(log5)(log 7)log_(7)x)`

B

`1/(x(log5)(log 7))`

C

`1/(xlogx)`

D

none of these

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The correct Answer is:
A
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