Answer
{$1, 3$}
Work Step by Step
RECALL:
Natural numbers are $1, 2, 3, ...$
Thus, the elements of $A$ that belong to the set of natural numbers are:
{$1, 3$}
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter R - Review of Basic Concepts - R.2 Real Numbers and Their Properties - R.2 Exercises - Page 19: 11
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