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If f(x+y)=2f(x)f(y),f'(5)=1024(log2)andf...

If `f(x+y)=2f(x)f(y),f'(5)=1024(log2)andf(2)=8` , then the value of `f '(3)` is a)`64(log2)` b)`128(log2)` c)256 d)256(log2)

A

`64(log2)`

B

`128(log2)`

C

256

D

256(log2)

Text Solution

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The correct Answer is:
A
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