differentiation

Question: If $y=x\log \left( \frac{x}{a+bx} \right)$, then ${{x}^{3}}\frac{{{d}^{2}}y}{d{{x}^{2}}}=$

1) $x\frac{dy}{dx}-y$

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

3) $y\frac{dy}{dx}-x$

4) ${{\left( y\frac{dy}{dx}-x \right)}^{2}}$

Solution:

Explanation: No Explanation

Differentiation by substitution Higher order derivatives

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