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\int_{0}^{x} \frac{\tan^{- 1} u}{1 + u^{2}} d u

এর মান কত?

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

\frac{x^{2}}{2}

\frac{1}{2} (\tan^{- 1} u)^{2}

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

ANS : 1

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