Answer
$-20$
Work Step by Step
Given: $\sum_{i=0}^4 (-1)^{i+1}i!$
Terms for the given series are: {$-1,1,-2,6,-24$}
Thus, the sum is:
$=-1+1+(-2)+6+(-24)$
$=-20$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 11 - Review Exercises - Page 869: 6
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