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\int \frac{d x}{\sqrt{9 - 4 x^{2}}} =

কত ?

\sin^{- 1} \frac{2 x}{3} + C

\cos^{- 1} \frac{2 x}{3} + C

\frac{1}{2} \sin^{- 1} \frac{2 x}{3} + C

\frac{2}{3} \sin^{- 1} \frac{2 x}{3} + C

\frac{1}{3} \sin^{- 1} \frac{2 x}{3} + C

ANS : 3

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