Answer
Arithmetic series
Work Step by Step
The difference of the subsequent terms is a constant of $2$, therefore it is arithmetic.
Also, this is a sum of the elements, which indicates that this is a series.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.