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\int_{0}^{1} \frac{1 - x}{1 + x} d x

এর মান কোনটি?

3 / n 3 + \frac{1}{2}

2 / n 2 - 1

4 / n 3 + 1

\frac{1}{2} / n 3

2 / n 3 + 5

ANS : 2

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