Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 11 - Further Topics in Algebra - 11.2 Arithmetic Sequences and Series - 11.2 Exercises: 53

Answer

$55 \pi$

Work Step by Step

$S_{n}=\dfrac {a_{1}+a_{n}}{2}\times n=\dfrac {\pi +10\pi }{2}\times 10=55\pi $
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