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Let f(x) be continuous and differentiabl...

Let f(x) be continuous and differentiable function for all reals and f(x + y) = f(x) - 3xy + f(y). If `lim_(h to 0)(f(h))/(h) = 7`, then the value of f'(x) is

A

`-3x`

B

7

C

`-3x + 7`

D

`2f(x) + 7`

Text Solution

Verified by Experts

The correct Answer is:
C
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