Answer
$\pi$
Work Step by Step
$5\Sigma _{k=1} \frac{\pi k}{15}$
=$\frac{\pi }{15}5\Sigma _{k=1} k$
=$\frac{\pi }{15}\frac{5(5+1)}{2}
=\pi$
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: 22
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