Question

Are these arithmetic sequences:

1. 2, 4, 8, 16...
2. -2, 1, 4, 7...
3. 5, 0, -5, -10...
4. 22, 28, 34...

Answer 1

1. No

2. Yes

3. Yes

4. Yes

Explanation:

In 1. the difference between each term is not constant.(it goes up by, 2, 4, 6)

2. The terms increase by the same amount(it all goes up by 3)

3. The terms decrease by the same amount(it all goes down by 5)

4. The terms increase by the same amount(it all goes up by 6)