Answer
$A\cap B=\{4\}$.
Work Step by Step
The given sets are
$A=\{1,3,4,5,9\}$ and $B=\{2,4,6,7,8\}$
The symbol $\cap$ means the set containing common elements of the given sets.
Hence, the answer is $A\cap B=\{4\}$.
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Appendix A - Review - A.1 Algebra Essentials - A.1 Assess Your Understanding - Page A11: 13
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