Question

Choose which one you believe doesn't belong, then explain the reason why you chose your answer above! ( thank you :) )

1. 5, 9, 13, 17, 21...
2. 5, 15, 45, 135, 405...
3. 5, 2, -1, -4, -7...
4. 10, 13, 16, 19, 22...

Answer 1

number 2

Explanation:

i think this right.. its just because 45 doesnt come after 15 when counting by 5's.. 20 does :) hope this helps

Answer 2

2

Explanation:

1,3,4 are arithmetic sequences

2 is a geometric sequence