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Let f and g be differentiable functions ...

Let f and g be differentiable functions satisfying `g(a) = b,g' (a) = 2` and fog =I (identity function). then f' (b) is equal to

A

`2`

B

`2//3`

C

`1//2`

D

None of these

Text Solution

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The correct Answer is:
C
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