A) \[\frac{y\,(y+x\log y)}{x(y\log x+x)}\]
B) \[\frac{y\,(x+y\log x)}{x(y+x\log y)}\]
C) \[-\frac{y(y+x\log y)}{x(x+y\log x)}\]
D) None of these
Correct Answer: C
Solution :
\[y\log x+x\log y=0\]; \[\therefore \]\[\frac{dy}{dx}=\frac{\partial f/\partial x}{\partial f/\partial y}\].
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