Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 11 - Review Exercises - Page 842: 103


True. $\displaystyle \sum_{k=1}^{8}3k=3\displaystyle \sum_{k=1}^{8}k$

Work Step by Step

$\displaystyle \sum_{k=1}^{8}3k=3(1)+3(2)+3(3)+3(4)+3(5)+3(6)+3(7)+3(8)=3(1+2+3+4+5+6+7+8)=3\displaystyle \sum_{k=1}^{8}k$
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