CalculusChallengeInfinite Sequences and Series ShareInfinite Sequences and Series · Challenge problemFind the exact value of ∑n=1∞1n(n+1) 2n\displaystyle\sum_{n=1}^{\infty}\frac{1}{n(n+1)\,2^n}n=1∑∞n(n+1)2n1.Check Show answer Walk through it step by step Practice more like this Review this concept