CalculusEasyInfinite Sequences and Series ShareInfinite Sequences and Series · Easy problemFind the fourth partial sum S4S_4S4 of the series ∑n=1∞1n(n+1)\displaystyle\sum_{n=1}^{\infty}\frac{1}{n(n+1)}n=1∑∞n(n+1)1.Check Show answer Walk through it step by step Practice more like this Review this concept