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1. $\int \frac{d x}{\sqrt{25 - 4 x^{2}}} = কত ?$

A. $\frac{1}{2} \sin^{- 1} \frac{2 x}{5} + k$
B. $\frac{1}{2} \sin^{- 1} \frac{2 x}{5} + k$
C. $\frac{1}{2} \sin^{- 1} \frac{2 x}{5} + k$
D. $\frac{1}{2} \sin^{- 1} \frac{2 x}{5} + k$

Answer: Option A

Explanation:

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