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\int \frac{d x}{\sqrt{- 2 x^{2} + 4 x + 1}}

এর মান কোনটি?

\frac{1}{\sqrt{2}} \sin^{- 1} {\sqrt{\frac{2}{3} (x - 1)}}

\frac{1}{5} \sin^{- 1} x

\frac{1}{\sqrt{3}} \sin^{- 1} (x + 1)

\frac{1}{6} \cos^{- 1} (x + 1

\frac{1}{\sqrt{2}} \cos^{- 1} (x - 1)

ANS : 1

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