Answer
$A(n)=19+(n-1)(-1)$
Work Step by Step
$A(1) =19$, so the first term is 19.
$A(n) = A(n - 1) -1$
$A(n)=A(1)+(n-1)d$
$A(n)=19+(n-1)(-1)$
The explicit formula $A(n)=19+(n-1)(-1)$ represents the arithmetic sequence.
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 - Chapter Review - Page 286: 30
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