CalculusMediumInfinite Sequences and Series ShareInfinite Sequences and Series · Medium problemFind the exact sum of ∑n=0∞(−2)nn!=1−2+42−86+1624−⋯\displaystyle\sum_{n=0}^{\infty}\frac{(-2)^n}{n!}=1-2+\frac{4}{2}-\frac{8}{6}+\frac{16}{24}-\cdotsn=0∑∞n!(−2)n=1−2+24−68+2416−⋯.Check Show answer Walk through it step by step Practice more like this Review this concept