MCQ
$\frac{ d }{ dx }\left(\tan ^{-1} 3 x \right)_{ x =3}=\ldots \ldots \ldots$
- ✓$\frac{3}{82}$
- B$\frac{1}{82}$
- C$\frac{2}{82}$
- D$\frac{1}{43}$
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