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 8th Edition
by Stewart, James
Published by
Cengage
ISBN 10:
1285740629
ISBN 13:
978-1-28574-062-1
Appendix A - Numbers, Inequalities, and Absolute Values - A Exercises - Page A10: 63
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