y=frac{sqrt[3]{1+3 x} sqrt[4]{1+4 x} sqrt[5]{ | vedclass

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(C) Given $y=\frac{\sqrt[3]{1+3 x} \sqrt[4]{1+4 x} \sqrt[5]{1+5 x}}{\sqrt[7]{1+7 x} \sqrt[8]{1+8 x}}$.Taking logarithm on both sides:$\log y = \frac{1

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(C) Given $y=\frac{\sqrt[3]{1+3 x} \sqrt[4]{1+4 x} \sqrt[5]{1+5 x}}{\sqrt[7]{1+7 x} \sqrt[8]{1+8 x}}$.Taking logarithm on both sides:$\log y = \frac{1}{3} \log (1+3 x) + \frac{1}{4} \log (1+4 x) + \frac{1}{5} \log (1+5 x) - \frac{1}{7} \log (1+7 x) - \frac{1}{8} \log (1+8 x)$.Differentiating both sides with respect to $x$:$\frac{1}{y} \frac{d y}{d x} = \frac{1}{3} \cdot \frac{3}{1+3 x} + \frac{1}{4} \cdot \frac{4}{1+4 x} + \frac{1}{5} \cdot \frac{5}{1+5 x} - \frac{1}{7} \cdot \frac{7}{1+7 x} - \frac{1}{8} \cdot \frac{8}{1+8 x}$.$\frac{1}{y} \frac{d y}{d x} = \frac{1}{1+3 x} + \frac{1}{1+4 x} + \frac{1}{1+5 x} - \frac{1}{1+7 x} - \frac{1}{1+8 x}$.At $x=0$,$y = \frac{\sqrt[3]{1} \sqrt[4]{1} \sqrt[5]{1}}{\sqrt[7]{1} \sqrt[8]{1}} = 1$.Substituting $x=0$ and $y=1$ into the derivative equation:$\frac{1}{1} \left(\frac{d y}{d x}\right)_{x=0} = \frac{1}{1+0} + \frac{1}{1+0} + \frac{1}{1+0} - \frac{1}{1+0} - \frac{1}{1+0} = 1 + 1 + 1 - 1 - 1 = 1$.Thus,$\left(\frac{d y}{d x}\right)_{x=0} = 1$.

$y=\frac{\sqrt[3]{1+3 x} \sqrt[4]{1+4 x} \sqrt[5]{1+5 x}}{\sqrt[7]{1+7 x} \sqrt[8]{1+8 x}}$. Then $\frac{d y}{d x}$ at $x=0$ is

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