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).