Answer
$63.5$ or $\frac{127}{2}$
Work Step by Step
We expand and simplify the sum:
$\displaystyle \sum_{i=-2}^{4}2^{3-i}$
$=2^{5}+2^{4}+2^{3}+2^{2}+2^{1}+2^{0}+2^{-1}$
$=32+16+8+4+2+1+0.5$
$=63.5$ or $\frac{127}{2}$
Calculus: Early Transcendentals 8th Edition
by Stewart, James
Published by
Cengage Learning
ISBN 10:
1285741552
ISBN 13:
978-1-28574-155-0
APPENDIX E - Sigma Notation - E Exercises - Page A 38: 28
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