Arithmetic Series Sum Formula Quizmaster
Review the Lesson | MATHguide homepage Updated June 18th, 2023

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Use the first 27 terms of the following arithmetic series for the problem below:

-9 - 6 - 3 + 0 + ...


What is the 27th term?		 a27 =
What is the sum of the first 27 terms? S27 =