MATHguide's Arithmetic Series Sum Formula Quizmaster
Review the Lesson | MATHguide homepage Updated February 19th, 2006
Status: Waiting for your answers.
Use the first 23 terms of the following arithmetic series for the problem below:

-6 - 1 + 4 + 9 + ...

What is the 23th term? a23 =
What is the sum of the first 23 terms? S23 =