Let , f (x) = x ^(2) + bx + 7 . If f ' (...

Let ,` f (x) = x ^(2) + bx + 7` . If `f ' (5) = 2f ' ((7)/(2)),` then the value of b is a)4 b)3 c)-4 d)-3

A

4

B

3

C

`-4`

D

`-3`

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The correct Answer is:

C

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