Answer:
Geometric
Explanation:
Given the sequence : 1.6, 0.8, 0.4, 0.2
To establish if the sequence is arithmetic or geometric ; we determine if it has a common ratio or common difference
Common difference, d are peculiar to arithmetic progression whole common ratio, r are peculiar to geometric.
Common difference, d ;
d2 - d1 = d3 - d2
0.8 - 0.6 = 0.4 - 0.8
-0.2 = - 0.4 (Hence, common difference does not hold).
Common ratio, r
r2 / r1 = r3 / r2
0.8/1.6 = 0.4 / 0.8
0.5 = 0.5
Hence, we can conclude that the sequence is geometric.
