If \[y=x\log \left( \frac{x}{a+bx} \right)\], then \[{{x}^{3}}\frac{{{d}^{2}}y}{d{{x}^{2}}}=\] [WB JEE 1991; Roorkee 1976]

\[{{\left( x\frac{dy}{dx}-y \right)}^{2}}\]

\[{{\left( y\frac{dy}{dx}-x \right)}^{2}}\]

If \[y=x\log \left( \frac{x}{a+bx} \right)\], then \[{{x}^{3}}\frac{{{

1.	If \[y=x\log \left( \frac{x}{a+bx} \right)\], then \[{{x}^{3}}\frac{{{d}^{2}}y}{d{{x}^{2}}}=\] [WB JEE 1991; Roorkee 1976]
A.	\[x\frac{dy}{dx}-y\]
B.	\[{{\left( x\frac{dy}{dx}-y \right)}^{2}}\]
C.	\[y\frac{dy}{dx}-x\]
D.	\[{{\left( y\frac{dy}{dx}-x \right)}^{2}}\]
Answer» C. \[y\frac{dy}{dx}-x\]

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If \[y=x\log \left( \frac{x}{a+bx} \right)\], then \[{{x}^{3}}\frac{{{d}^{2}}y}{d{{x}^{2}}}=\] [WB JEE 1991; Roorkee 1976]

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