### Home > A2C > Chapter 3 > Lesson 3.1.6 > Problem3-82

3-82.

Determine whether each of the following sequences is arithmetic, geometric, or neither. Then find a rule for the sequence, if possible.

1. $12.2, 13, 13.8, …$

See problem 3-46 for examples and hints.

1. $90, 81, 72.9, …$

See part (a).

1. $1, 1, 1, …$

This could be either arithmetic or geometric. Why?

1. $2, 4, 16, …$

See part (a).