# Chapter 11 - Section 11.2 - Arithmetic and Geometric Sequences - Exercise Set - Page 646: 32

Geometric Sequence $a_{1} = 2$ $r=3$

#### Work Step by Step

Given Sequence : $2,6,18$ Geometric Sequence. First Term: $a_{1} = 2$ Common ratio: $r= \frac{a_{n}}{a_{n-1}} = \frac{a_{2}}{a_{1}} = \frac{6}{2} =3$

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