University Calculus: Early Transcendentals (3rd Edition)

Published by Pearson
ISBN 10: 0321999584
ISBN 13: 978-0-32199-958-0

Chapter 5 - Section 5.2 - Sigma Notation and Limits of Finite Sums - Exercises: 21

Answer

$-56$

Work Step by Step

$\sum\limits_{k=1}^7(-2k)=-2\cdot\sum\limits_{k=1}^7k=-2\cdot(1+2+3+4+5+6+7)=-2\cdot28=-56$
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