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

x^{- 2 - \frac{1}{x}} (1 - I n x)

x^{\frac{1}{x} + 2} (I n x - 1)

x^{\frac{1}{x} + 2} (1 - I n x)

x^{- 2 - \frac{1}{x}} (I n x - 1)

ANS : 4

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