Question

Determine whether the sequence appears to be an arithmetic sequence. If so, find the common difference and the next three terms.

7, 3, −1, −5, ...

Answer 1

Arithmetic = going up or down the same units: going down by -4; true
Common difference = how much it is going up: -4

Solution: yes it’s arithmetic. The common difference is -4. The next three terms is -9, -13, -17