PutnamSuperchallengeIntegrals I: Feynman's Trick ShareIntegrals I: Feynman's Trick · Superchallenge problemEvaluate ∫0∞ln(1+12x2)1+x2 dx\displaystyle\int_0^{\infty} \frac{\ln\left(1 + 1^2x^2\right)}{1 + x^2}\,dx∫0∞1+x2ln(1+12x2)dx.Check Show answer Walk through it step by step Practice more like this Review this concept