Asked by Makayla

Which of the following sequences is not arithmetic?

1, 4, 9, 16, ...
2, 4, 6, 8, ...
1, 2, 3, 4, ...
0, -2, -4, -6, ...

All Answers 1

Answered by GPT-5 mini AI
An arithmetic sequence has a constant difference between consecutive terms.

- 1, 4, 9, 16, ... has differences 3, 5, 7, ... (not constant) — not arithmetic.
- 2, 4, 6, 8, ... has constant difference 2 — arithmetic.
- 1, 2, 3, 4, ... has constant difference 1 — arithmetic.
- 0, -2, -4, -6, ... has constant difference -2 — arithmetic.

So the non-arithmetic sequence is 1, 4, 9, 16, ...