Question

antidiff
proving..

Answer 1

\[f(x)=\ln (x ^{2}+1), then f'(x)=\frac{ 2x }{ x^2 +1 }\]

use this fact to find an antiderivative of \[\frac{ (x+1)^1 }{ x^2 +1 }\]

Answer 2

hmm let me think a min