1.

If y=sqrt(x+sqrt(y+sqrt(x+sqrt(y+...oo)))), then (dy)/(dx)=

Answer»

`(y^2 + X)/(2y^3 - 2XY - 1)`
`(y^2 - x)/(2y^3 - 2xy - 1)`
`(y^2 -x)/(2y^3 - 2xy + 1)`
`(y^2)/(2y^3 - 2xy + 1)`

ANSWER :B


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