Answer
$10$
Work Step by Step
The given summation notation is expressed as
$1(1-2)+2(2-2)+3(3-2)+4(4-2)$
$=1(-1)+2(0)+3(1)+4(2)$
$=-1+0+3+8$
$= 10$
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 11 - Test - Page 669: 9
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