sqrt(y+x)+sqrt(y-x)=c

If sqrt(x+y)+sqrt(y-x)=c , then (d^2y)/(dx^2) =

sqrt(x+y)+sqrt(y-x)=c,then(d^(2)y)/(dx^(2)) equals

sqrt(x+y)+sqrt(y-x)=c , then (d^2y)/(dx^2) equals

IF sqrt(x+y)+sqrt(y-x)=c then (d^2y)/(dx^2)=K/c^2 , find the value of K.

If 0 (a) sqrt(x)-\ sqrt(y)=\ sqrt(x-y) (b) sqrt(x)+\ sqrt(x)=\ sqrt(2x) (c) xsqrt(y)=ysqrt(x) (d) sqrt(x y)=\ sqrt(x)\ sqrt(y)

If 0

(x - y) / (sqrt(x)- sqrt(y)) = ____