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If ysqrt(x^2+1)=log{sqrt(x^2+1)-x} , the...

If `ysqrt(x^2+1)=log{sqrt(x^2+1)-x}` , then `(x^2+1)(dy)/(dx)+x y+1` is equal to.......

A

0

B

1

C

2

D

None of these

Text Solution

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The correct Answer is:
A
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