Answer
$-1,1,-1,1,-1$
Work Step by Step
$a_{n}=\cos n\pi$
Substitute $1,2,3,4,5$ to $n$:
$a_{1}=\cos (1\pi)=-1$
$a_{2}=\cos (2\pi)=1$
$a_{3}=\cos (3\pi)=\cos \pi=-1$
$a_{4}=\cos (4\pi)=\cos 0=1$
$a_{5}=\cos (5\pi)=\cos \pi=-1$
Calculus: Early Transcendentals 9th Edition
by Stewart, James
Published by
Cengage Learning
ISBN 10:
1337613924
ISBN 13:
978-1-33761-392-7
Chapter 11 - Section 11.1 - Sequences - 11.1 Exercises - Page 735: 9
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