Back to Derive geometric series formula — Problem 3 · Task Set 7

HSA.SSE.B.4 Tutor Intake — Geometric Series Formula

This short check helps your tutor understand where to start. Answer each question on your own. A calculator is allowed. If you're not sure, give your best try. The goal is to find what to work on together, not to grade you.

Grade 9·10 problems·~15 min·Common Core Math - HS Algebra·standard·hsa-sse-b-4

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Procedures

Find the sum of the geometric series
$64 + 32 + 16 + 8 + 4 + 2 + 1$
using the formula $S = \dfrac{a(1 - r^n)}{1 - r}$ with
$a = 64$ , $r = \dfrac{1}{2}$ , $n = 7$ .

Enter the sum $S$ .