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The function f is differentiable with f(...

The function f is differentiable with `f(a)=8,f'(1)=(1)/(8)`, If f is invertible and `g=f^(-1)` then :

A

`g'(8)=1/8`

B

`g'(8)=8`

C

`g'(1)=(1)/(8)`

D

`g(1)=8`.

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The correct Answer is:
B
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