# How do you determine whether the sequence #10, 8, 6, 4, 2,...# is arithmetic and if it is, what is the common difference?

##### 1 Answer

Jul 28, 2017

common difference is

#### Explanation:

A sequence is arithmetic if the difference between consecutive terms is constant.

That is you add or subtract the same number to get the next term

In this case we have:

the differences between each terms are

the differences are all the same so it is an Arithmetic sequence

the common difference is