# How do you determine whether the sequence #3, 5/2, 2, 3/2, 1,...# is arithmetic and if it is, what is the common difference?

##### 1 Answer

Feb 20, 2017

Arithmetic.

#### Explanation:

Take the 2nd term and minus the 1st term.

Now take the 3rd term and minus the 2nd term.

Notice that the differences are the same. Hence there is a common difference (difference of -0.5).