CalculusMediumInfinite Sequences and Series ShareInfinite Sequences and Series · Medium problemEvaluate ∑n=1∞[(12)n+(13)n]\displaystyle\sum_{n=1}^{\infty}\Big[\Big(\tfrac12\Big)^{n}+\Big(\tfrac13\Big)^{n}\Big]n=1∑∞[(21)n+(31)n].Check Show answer Walk through it step by step Practice more like this Review this concept