engineering recuitment BARC Stipendiary Trainee Category II 2023 Mock Test Mathematics Integral Calculus Indefinite Integrals
\(\rm \int{x\over1+x^2}\;dx = \)
1
\(\rm \log (1 + x^2) + c\)
2
\(\rm \log \sqrt{(1 + x^2)} + c\)
3
2\(\rm \log (1 + x^2) + c\)
4
None of these