OpenStax, Algebra and Trigonometry 2e §13.4 Series and Their Notations · Example 6 · Probability · Counting & chance

Finding the First n Terms of a Geometric Series

Use the formula to find the indicated partial sum of each geometric series.

ⓐ $S_{11}$ for the series $8 + - 4 + 2 + \dots$
ⓑ $\sum^{}_{k = 1}^{6} 3 \cdot 2^{k}$

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OpenStax, Algebra and Trigonometry 2e · §13.4 Series and Their Notations · Example 6

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