Determine whether the given sequence is an arithmetic sequence.

Question

Determine whether the given sequence is an arithmetic sequence.

1. -12, -7, -2, 3, 8, ...

2. 1, -1, 1, -1, 1, ...

Answer 1

1. It is because there is a constant difference of +5
2. No, because there is no constant difference. (oscillates between -2 and +2)