Answer:
First sequence: Neither; second sequence: arithmetic; third sequence: geometric.
Step-by-step explanation:
An arithmetic sequence is a sequence in which each term is found by adding a constant to the previous term.
The only sequence that does this is the second one; to get from -1 to 3, add 4; to get from 3 to 7, add 4; to get from 7 to 11, add 4; and to get from 11 to 15, add 4.
A geometric sequence is a sequence in which each term is found by multiplying a constant to the previous term.
The only sequence that does this is the last one; to get from 36 to 12, multiply by 1/3; to get from 12 to 4, multiply by 1/2; to get from 4 to 4/3, multiply by 1/3; and to get from 4/3 to 4/9, multiply by 1/3.
Since the first sequence is not arithmetic and is not geometric, it is neither.
