College Algebra 7th Edition

Published by Brooks Cole
ISBN 10: 1305115546
ISBN 13: 978-1-30511-554-5

Chapter 8, Sequences and Series - Section 8.1 - Sequences and Summation Notation - 8.1 Exercises: 19

Answer

$a_{1}=1$ $a_{2}=2$ $a_{3}=3$ $a_{4}=5$ $a_{5}=8$

Work Step by Step

We are given: $a_{n}=a_{n-1}+a_{n-2}$ and $a_{1}=1$ and $a_{2}=2$ We evaluate: $a_{3}=a_{2}+a_{1}=2+1=3$ $a_{4}=a_{3}+a_{2}=3+2=5$ $a_{5}=a_{4}+a_{3}=5+3=8$
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