Chapter 7 - Exponents and Exponential Functions - 7-8 Geometric Sequences - Practice and Problem-Solving Exercises - Page 470: 16

Geometric, the ratio is 2.

You have the sequence:3,6,12,24. Find the common ratio by using the formula: R=$\frac{a2}{a1}$,R=$\frac{a4}{a3}$.Plug in the values to get the ratios. r=$\frac{6}{3}$=2 r=$\frac{24}{12}$=2 There is a common ratio, r=2. So the sequence is geometric.