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[" 30.यदि "xy log(x+y)=1" हो,तो सिद्ध की...

[" 30.यदि "xy log(x+y)=1" हो,तो सिद्ध कीजिए कि - "],[qquad (dy)/(dx)=(y(x^(2)y+x+y))/(x(xy^(2)+x+y))]

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