Question

Determine if the sequence below is arithmetic or geometric and determine the

common difference / ratio in simplest form.
12, 10, 8, ...

Answer 1

Arithmetic sequence

Explanation:

A sequence is described as an arithmetic sequence when there is a common difference between the numbers

A sequence is a geometric sequence when there is a common ratio between the numbers

12,10,8

10-12= -2

8-10= -2

10/12= 0.83

8/10= 0.8

Hence the sequence is an arithmetic sequence with a common difference of -2