Thomas' Calculus 13th Edition

Published by Pearson
ISBN 10: 0-32187-896-5
ISBN 13: 978-0-32187-896-0

Chapter 5: Integrals - Section 5.2 - Sigma Notation and Limits of Finite Sums - Exercises 5.2 - Page 265: 21

Answer

-56

Work Step by Step

$7\Sigma _{k=1}$-2k =-2 $7 \Sigma _{k=1}$k=-2$\frac{7(7+1)}{2}=-56$
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