Back to Derive geometric series formula — Problem 1 · Task Set 8

Exercises: Geometric Series Formula

For each problem, identify the parameters a, r, and n before applying any formula. Always check whether r = 1. Show your work for computation problems.

Grade 9·22 problems·~45 min·Common Core Math - HS Algebra·standard·hsa-sse-b-4

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Recall / Warm-Up

The sequence $3, 6, 12, 24, 48$ is geometric. What is the common ratio $r$ ?

$r = 3$

$r = 6$

$r = 2$

$r = 0.5$