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[" 35.If "x sqrt(1+y)+y sqrt(1+x)=0" for...

[" 35.If "x sqrt(1+y)+y sqrt(1+x)=0" for "x!=y" .Prove the "],[" following: "],[qquad (dy)/(dx)=(-1)/((1+x)^(2)).quad " (Delhi "2011C" ,AI "2008C)]

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