PutnamSuperchallengeIntegrals I: Feynman's Trick ShareIntegrals I: Feynman's Trick · Superchallenge problemEvaluate ∑n=2∞1n2−1\displaystyle\sum_{n=2}^\infty \frac{1}{n^2 - 1}n=2∑∞n2−11.Check Show answer Walk through it step by step Practice more like this Review this concept