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Question

$x^{x} y^{y} = 1$ হলে, $\frac{d y}{d x} =$ কত?

$\frac{1 + l n x}{1 + l n y}$

$- \frac{1 + l n x}{1 + l n y}$

$\frac{1 - l n x}{1 + l n y}$

$\frac{1 + l n x}{1 - l n y}$

ANS : 2

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