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\int_{- 1}^{1} \frac{e^{x} d x}{1 + 2 e^{x}}

এর মান কোনটি?

ln ( 1 +2)

\frac{1}{2} \ln \frac{1 + 2 e}{1 + 2 e^{- 1}}

\frac{1}{3} \ln (1 + 2 e)

\frac{1}{4} \ln (1 - 2 e)

\frac{1}{3} \ln (1 + 3 e)

ANS : 2

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