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$\int \frac{d x}{e^{2 x} + e^{- 2 x}} = ক ত ?$

\tan^{- 1} (e^{2 x}) + c

\frac{1}{2} \tan^{- 1} (e^{2 x}) + c

\frac{1}{2} \tan^{- 1} (e^{- 2 x}) + c

কোনটিই নয়

ANS : 0

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