College Algebra (11th Edition)

Published by Pearson
ISBN 10: 0321671791
ISBN 13: 978-0-32167-179-0

Chapter R - Section R.2 - Real Numbers and Their Properties - R.2 Exercises - Page 17: 4



Work Step by Step

Natural numbers include all whole numbers greater than and not including zero. Natural numbers are always positive, and can be represented by the set {1,2,3...}. Integers contain all numbers, positive, negative or zero, that have no decimal part. Integers can be represented by the set {...-3, -2, -1, 0, 1, 2, 3...} Therefore, since natural numbers also have no decimal part, they fit within the definition of integers. All natural numbers are integers.
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