Geometric Series Formula Quizmaster : MATHguide
Geometric Series Quizmaster: MATHguide
Review the Lesson | MATHguide homepage Updated June 18th, 2023

Status: Waiting for your answers.

Use the first 8 terms of the following geometric series for the problem below:

18 - 90 + 450 - 2250 + ...

What is the value of the common ratio? r =
What is the sum of the first 8 terms?
(to the nearest tenth) 		S8 =