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যদি

x^{y} = e^{x - y}

\frac{d y}{d x}

এর মান কত?

\frac{1}{(1 + \ln x)}

\frac{1}{\ln x}

\frac{\ln x}{(1 + \ln x)^{2}}

\frac{\ln x}{(1 + \ln x)^{2}}

ANS : 3

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