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IF y=tan^-1((sqrtx-x)/(1+x)^(3/2)) then ...

IF `y=tan^-1((sqrtx-x)/(1+x)^(3/2))` then y'(1) is

A

0

B

`1/2`

C

-1

D

`-1/4`

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The correct Answer is:
D
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