Answer: geometric series
Explanation:
If it is arithmetic, the difference from each term to the next will always be the same.
4096 - 1024 = 3072; 1024 - 256 = 768
3072 ≠ 768. so not arithmetic
If it is geometric, the ratio of each term to the next will always be the same.
4096/1024 = 4
1024/256 = 4
256/64 = 4
64/16 = 4
This is a geometric series. Each term (after the first) is (1/4) of the term before.
Hope this helps.