tell whether the sequence is arithmetic. if it is, what is the common difference?
10, 15, 21, 28, . . .
The sequence is arithmetic.
To find the common difference, we look at the differences between consecutive terms:
15 - 10 = 5
21 - 15 = 6
28 - 21 = 7
The differences are not constant, meaning that the common difference varies. Therefore, there is no specific common difference for this sequence.