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If x ylog(x+y)=1,p rov et h a t(dy)/(dx)...

If `x ylog(x+y)=1,p rov et h a t(dy)/(dx)=-(y(x^2y+x+y))/(x(x y^2+x+y))dot`

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Verified by Experts

The correct Answer is:
`= ((x-y)/(x-y))((x+y-xy)/((1-x)(1-y)))=((x+y-xy)/((1-x)(1-y)))`
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