MCQ
$\frac{d}{d x}\left[2 \tan ^{-1} x\right]=$
- A$\frac{1}{1+x^2}$
- B$\frac{1}{1+4 x^2}$
- C$\frac{2}{1+4 x^2}$
- ✓$\frac{2}{1+x^2}$
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| ${X}=\left(x_1\right)$ | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| $P\left(x_2\right)$ | $a_1$ | $3 a_1$ | $5 a_1$ | $7 a_1$ | $9 a_1$ | $11 a_1$ | $13 a_1$ | $15 a_1$ | $17 a_1$ |