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Given f' (1) = 1 and d/(dx) f(2x))=f'(x...

Given `f' (1) = 1 and d/(dx) f(2x))=f'(x) AA x > 0`. If `f' (x)` is differentiable then there exists a numberd `x in (2,4)` such that `f'' (c)` equals

A

`-1//4`

B

`-1//8`

C

`1//4`

D

`1//8`

Text Solution

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The correct Answer is:
B
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