Question
Find each sum.$$\sum_{k=1}^n\left(\frac{2}{3}\right)^k$$
Step 1
A geometric series is of the form \(\sum_{k=1}^n ar^{k-1}\), where \(a\) is the first term and \(r\) is the common ratio. In this case, the series is \(\sum_{k=1}^n \left(\frac{2}{3}\right)^k\). Show more…
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