Calculus: Early Transcendentals 8th Edition

Published by Cengage Learning
ISBN 10: 1285741552
ISBN 13: 978-1-28574-155-0

APPENDIX E - Sigma Notation - E Exercises: 3

Answer

$3^{4}+3^{5}+3^{6}$

Work Step by Step

We expand the sigma notation by writing $3^{i}$ as $i$ increases from 4 to 6: $\displaystyle \sum_{i=4}^{6}3^{i}=3^{4}+3^{5}+3^{6}$
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