Answer
$0.1+0.4+1.6+...+102.4=\displaystyle \sum_{n=1}^{6}0.1(4)^{n-1}$
Work Step by Step
$102.4=0.1(1024)=0.1(4)^5$
$0.1+0.4+1.6+...+102.4=0.1(4)^0+0.1(4)^1+0.1(4)^2+...+0.1(4)^5=\displaystyle \sum_{n=1}^{6}0.1(4)^{n-1}$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 11 - 11.3 - Geometric Sequences and Series - 11.3 Exercises - Page 796: 67
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