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A function f : R -> R^+ satisfies f(x+y)...

A function `f : R -> R^+` satisfies `f(x+y)= f(x) f(y) AA x in R` If `f'(0)=2` then `f'(x)=`

A

`f(x)`

B

`2f(x)`

C

`(1)/(f(x))`

D

`(2)/(f(x))`

Text Solution

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The correct Answer is:
B
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