Algebra 3
Lesson 12.3, Part A: Finite Geometric Series
I can find the sum of a finite geometric series.
Common Core Content Standards: A-SSE.B.4, A-SSE.A.2, MP.7
Vocabulary: Define the following terms using the online glossary:
Series
Examples:
Example 1: Engage: Complete the rectangle activity and answer Reflection
question #1.
Example 2: Explore Concept 2: Work through the activity and write the final
formula (bottom of the page) for the Sum of a Finite Geometric Series.
Example 3: Explain Concept 3: Work through the example to find the number of
terms in the series: 2 + 6 + 18 + ⋯ + 1458.
Example 4: Explain Concept 3: Work through the example to find the sum of the
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series: ! + !" + !" + ⋯ + !"#$.