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যদি

y^{x} = x^{y}

\frac{d y}{d x}

\frac{\ln y + \frac{y}{x}}{\ln x + \frac{x}{y}}

\frac{\ln y - \frac{x}{y}}{\ln x - \frac{y}{x}}

\frac{\ln y - \frac{y}{x}}{\ln x - \frac{x}{y}}

\frac{\ln x - \frac{y}{x}}{\ln y - \frac{x}{y}}

ANS : 3

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