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If x+y=tan^(-1)y" and "(d^(2)y)/(dx^(2))...

If `x+y=tan^(-1)y" and "(d^(2)y)/(dx^(2))=f(y)(dy)/(dx)`, then `f(y)=`

A

`-(2)/(y^(3))`

B

`(2)/(y^(3))`

C

`(1)/(y)`

D

`-(1)/(y)`.

Text Solution

Verified by Experts

The correct Answer is:
B
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