Question

Identifying Geometric Sequences Which sequences are geometric? Check all that apply. 10, 7.5, 5.625, 4.21875, … 160, 40, 10, 2.5, … 20, 70, 245, 857.5, … 13, 16.5, 20, 23.5, … 5, 5.5, 6.05, 6.655, … 16, 17.1, 18.2, 19.3, …

Answer 1

The answer is 1,2,3,5.

Explanation:

Multiply to get the next number

Answer 2

Geometric means you multiply to get the next number.
The first one is geometric with r =3/4
The second one is with r= 1/4.
The third one is with r=3.5
The fourth is NOT.
The fifth one is with r=1.1
The sixth is NOT