Derivative of the function f(x) = log5 (...

Derivative of the function `f(x) = log_5 (log_7(x) )` and ` x gt 7` is :

A

`(1)/(x(ln5)(ln7)(log_7x))`

B

`(1)/(x(ln5)(ln7))`

C

`(1)/(x(ln x))`

D

None of these

Verified by Experts

The correct Answer is:

A

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