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

- \frac{e^{- x}}{x - 1} + C

\frac{e^{- 2 x}}{x - 1} + C

- \frac{e^{- x}}{x - 1} + C

\frac{x^{- x}}{x} + C

কোনটিই নয়

ANS : 1

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