Answer
-56
Work Step by Step
$7\Sigma _{k=1}$-2k
=-2 $7 \Sigma _{k=1}$k=-2$\frac{7(7+1)}{2}=-56$
Thomas' Calculus 13th Edition
by Thomas Jr., George B.
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
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