" 18.If "x sqrt(1+y+y)sqrt(1+x)=0," then "(dy)/(dx)" is "

If x sqrt(1+y)+y sqrt(1+x)=0, then (dy)/(dx) is equal to (1)/((1+x)^(2))(b)-(1)/((1+x)^(2))(1)/((1+x^(2)))(d)(1)/((1+x))

If x sqrt(y+1)+y sqrt(x+1)=0 & x!=y, then (dy)/(dx)=

If y= sqrt(x-1) +sqrt( x+1) ,then (dy)/(dx)

If y=sqrt(x)+(1)/(sqrt(x)) , then (dy)/(dx)=

x sqrt(1 + y) + y sqrt(1 + x) =0implies (dy)/(dx)=

If y=sqrt(x)+(1)/(sqrt(x)) , then (dy)/(dx) at x=1 is

If x sqrt(1+y)+y sqrt(1+x)=0, then prove that (dy)/(dx)=-(1+x)^(-2)

If x sqrt(1+y)+y sqrt(1+x)=0 then the value of (dy)/(dx) is -

If sqrt(x/y)+sqrt(y/x)=1 , then dy/dx

If y= sqrt (x+(1)/( x) ),then (dy)/(dx) =