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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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Fluency Practice

1.

Find the sum of the geometric series 3+6+12+24+48+963 + 6 + 12 + 24 + 48 + 96.

Use the formula S=a(rn−1)r−1S = \dfrac{a(r^n - 1)}{r - 1}.