PutnamSuperchallengeIntegrals I: Feynman's Trick ShareIntegrals I: Feynman's Trick · Superchallenge problemEvaluate ∑n=0∞n+12n\displaystyle\sum_{n=0}^\infty \frac{n+1}{2^n}n=0∑∞2nn+1.Check Show answer Walk through it step by step Practice more like this Review this concept