Answer
[3,$\infty$)
Work Step by Step
The union of 2 sets is is all combination of all of the numbers in the 2 sets. In this case, numbers that are in [3,$\infty$) (6,$\infty$) or both. Therefore, the set is [3,$\infty$)
College Algebra (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-32178-228-3
ISBN 13:
978-0-32178-228-1
Chapter 1 - Equations and Inequalities - Exercise Set 1.7 - Page 196: 25
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