differentiation

Question: $\frac{d}{{dx}}[(1 + {x^2}){\tan ^{ - 1}}x] = $



1) $x{\tan ^{ - 1}}x$
2) $2{\tan ^{ - 1}}x$
3) $2x{\tan ^{ - 1}}x + 1$
4) $x{\tan ^{ - 1}}x + 1$
Solution: Explanation: Explanation
standard-differentiation

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