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\int e^{- x} (- \frac{1}{x} - \frac{1}{x^{2}}) d x = ?

\frac{e^{x}}{x}

\frac{- e^{x}}{x}

- \frac{e^{x}}{x}

\frac{2 e^{x}}{x}

ANS : 1

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