See Example. List all numbers from the set that are
(a) natural numbers
(b) whole numbers
(c) integers
(d) rational numbers
(e) irrational numbers
(f) real numbers.
EXAMPLE Determining Whether a Number Belongs to a Set
List the numbers in the following set that belong to each set of numbers.
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(a) Natural numbers: 5
(b) Whole numbers: 0 and 5
The whole numbers consist of the natural (counting) numbers and 0.
(c) Integers: −5, 0, and 5
(d) Rational numbers:
Each of these numbers can be written as the quotient of two integers.
(e) Irrational numbers:
(f) Real numbers: All the numbers in the set are real numbers.
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