Question

Is 0, 2, 4, 6, a arithmetic sequence

Answer 1

Yes, 0 + 2 = 2
2 + 2 = 4
4 + 2 = 6.
Since they're just ADDING 2, not MULTIPLYING by 2, it's arithmetic, not geometric.

Answer 2

Yes! Because

2+0=2
2+2=4
4+2=6