### Home > CCA > Chapter 7 > Lesson 7.1.2 > Problem 7-28

7-28.

Examine each sequence below. State whether it is arithmetic, geometric, or neither. For the sequences that are arithmetic, find the formula for

*t*(*n*). For the sequences that are geometric, find the sequence generator for*t*(*n*). Homework Help ✎1, 4, 7, 10, 13, …

0, 5, 12, 21, 32, …

2, 4, 8, 16, 32, …

5, 12, 19, 26, …

*x*,*x*+ 1,*x*+ 2,*x*+ 3 …3, 12, 48, 192, …

The sequence is neither arithmetic nor geometric.

The sequence is geometric.

*r* = 2

Do the terms in the sequence increase by adding a constant amount or multiplying by a constant?

See part (d).

The sequence is arithmetic.

*d* = 1

See part (d).