Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 11 - Review Exercises - Page 869: 23



Work Step by Step

Sum of first $n$th term of an arithmetic sequence can be calculated as: $S_n=\dfrac{n}{2}[a_1+a_n]$ since, we have {$4,2,0,...., -44$} This implies that $a_1=4,a_n=-44,n=25$ Now, $S_{25}=\dfrac{25}{2}[4+(-44)]=-500$
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