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$\int e^{x} (\frac{1}{x} - \frac{1}{x^{2}}) dx$ এর মান কত ?

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

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

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

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

ANS : 3

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