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If y = \(\cfrac{log\,\text x}{\text x}\), show that \(\cfrac{d^2y}{d\text x^2}=\cfrac{2log\text x-3}{\text x^3}\)

log x/x, d2y/dx2 = (2log x - 3)/x3

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Differentiating with respect to x

Differentiating with respect to x

Hence Proved

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