Geometric Series Formula Quizmaster : MATHguide
Geometric Series Quizmaster: MATHguide
Review the Lesson | MATHguide homepage Updated March 7th, 2019

Status: Waiting for your answers.

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

10 - 15 + 22.5 - 33.75 + ...

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