MCQ
$\frac{d}{d x}\left(\sin ^{-1} \frac{2 x}{1+x^2}\right)=$
- ✓$\frac{2}{1+x^2}$
- B$\frac{-2}{1+x^2}$
- C$\frac{1}{1+x^2}$
- D$\frac{2}{1+x}$
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