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

কত?

\frac{e^{x}}{x} + c

\frac{a e^{x}}{2} + c

\frac{a e^{x}}{x} + c

\frac{a e^{x}}{x^{2}} + c

ANS : 3

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