Answer
$a\lt (a+b)/2 \lt b$
Work Step by Step
Add $a$ to both sides
Divide by 2
Then
Add $b$ on both sides
Divide by 2
Combine the inequalities and result is $a\lt (a+b)/2 \lt b$
Calculus: Early Transcendentals 9th Edition
by Stewart, James
Published by
Cengage Learning
ISBN 10:
1337613924
ISBN 13:
978-1-33761-392-7
APPENDIX A - Numbers, Inequalities, and Absolute Values - A Exercises - Page A10: 63
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