How to write the sum in sigma notation given a geometric sequence

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👉 Learn how to write the sum from a geometric series. A series is the sum of the terms of a sequence. A geometric series is the sum of the terms of a geometric sequence. The formula for the sum of n terms of a geometric sequence is given by Sn = a[(r^n - 1)/(r - 1)], where a is the first term, n is the term number and r is the common ratio.

To write the sum we will either be given the series as a sum or written in sigma notation. Either way, we will need to determine the rule of the sum by identifying the common ratio and first term.

Organized Videos:
✅Series
✅Series | Learn About
✅Find the Sum of the Arithmetic Series
✅Find the Sum of the Geometric Series
✅Write the Rule of the Geometric Series
✅Find the Sum of a Series
✅Write the Rule of the Series

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