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If f(x)=sqrt(x^(2)+1), then the value of...

If `f(x)=sqrt(x^(2)+1)`, then the value of `f'(-1)` is -

A

`(1)/(sqrt(2))`

B

`-(1)/(sqrt(2)) `

C

1

D

-1

Text Solution

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The correct Answer is:
B
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