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Let f and g be differentiable functions ...

Let f and g be differentiable functions such that `("fog")'=I`. If `g'(a)=2` and `g(a)=b`, then `f'(b)` equals :

A

`2//3`

B

1

C

0

D

`1//2`

Text Solution

Verified by Experts

The correct Answer is:
D
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