## Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole

# Chapter 12 - Section 12.2 - Arithmetic Sequences - 12.2 Exercises - Page 857: 7

#### Answer

a. $-6.-10.-14.-18.-22$ b. $-4$ c. see below

#### Work Step by Step

a. $a_{1}=-6-4(1-1)=-6$ $a_{2}=-6-4(2-1)=-10$ $a_{3}=-6-4(3-1)=-14$ $a_{4}=-6-4(4-1)=-18$ $a_{5}=-6-4(5-1)=-22$ (b) $-10-(-6)=(-14)-(-10)=-18-(-14)=-22-(-18)=-4$ The common difference is $-4$. (c) graphed using desmos.com

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