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If x sqrt (y+1) + y sqrt (x+1) =0 and x ...

If x `sqrt (y+1)` + y `sqrt (x+1)` =0 and x `!=` y then dy/dx=............ A) `frac{1}{(1+x)^2}` B) `- frac{1}{(1+x)^2}` C) `(1+x)^2` D) `- frac{x}{x+1}`

A

`frac{1}{`(1+x)^2`}`

B

`- frac{1}{`(1+x)^2`}`

C

`(1+x)^2`

D

- 'frac{x}{x+1}`

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