Answer
a) $A(n)=21+(n-1)2$
b) $A(n)=2+(n-1)7$
Work Step by Step
a) We have $A(1)=21$
$A(n)=A(n-1)+2$
$A(n)=A(1)+(n-1)d$
$A(n)=21+(n-1)2$
b) We have $A(1)=2$
$A(n)=A(n-1)+7$
$A(n)=A(1)+(n-1)d$
$A(n)=2+(n-1)7$
Algebra 1: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281140
ISBN 13:
978-0-13328-114-9
Chapter 4 - An Introduction to Functions - 4-7 Arithmetic Sequences - Got It? - Page 278: 5
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