Answer
The given sequence is an arithmetic sequence because the difference of any two consecutive terms is constant.
The common difference = 4
Work Step by Step
The given sequence is = 4, 8, 12, 16, 20.
This is an arithmetic sequence because the difference of any two consecutive terms is constant.
The common difference = 20 - 16 = 16 - 12 = 12 - 8 = 8 - 4 = 4