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

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Use the first 26 terms of the following arithmetic series for the problem below:

-11 - 9 - 7 - 5 - ...


What is the 26th term?		 a26 =
What is the sum of the first 26 terms? S26 =