Back to Derive geometric series formula — Problem 2 · 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

Work through problems with immediate feedback

Recall / Warm-Up

What is the 4th term of the geometric sequence with first term $a = 5$ and common ratio $r = 3$ ?

$45$

$135$

$405$

$60$