Sigma Notation: Geometric Series
View the Lesson | MATHguide homepage Updated June 20th, 2017


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Problem: Determine the first three terms, final term, and the sum of this series.
 
  12 
 Σ(1/4)(-2)n - 1 =+++ ··· +=
  n=1  term 1 term 2 term 3 last term sum