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Videos, worksheets, games and activities to help Algebra II students learn about geometric series.

We can use what we know of geometric sequences to understand geometric series. A geometric series is a series or summation that sums the terms of a geometric sequence. There are methods and formulas we can use to find the value of a geometric series. It can be helpful for understanding geometric series to understand arithmetic series, and both concepts will be used in upper-level Calculus topics.

The formula for the partial sum of the first nth terms of a geometric series is

\({S_n} = \frac{{{a_1}\left( {1 - {r^n}} \right)}}{{1 - r}}\)

This video introduces geometric series.

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You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

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