Question

How do you write the set in roster form? In set builder notation? D is the set of whole numbers less than 3.
A. D = {0,1,2,3,4,5}; D = {x is a whole number, x < 3}
B. D = {0,1}; D = {x | x < 3}
C. D = {0,1,2}; D = {x | x is a whole number, x < 3}
D. D = {0,1,2,3,4,5,6,7}; D = {x < 3}

Answer 1

A roster is a list. Which choice lists the whole numbers less than three?

Answer 2

Definition: The set of Whole Numbers consists of the set of Natural Numbers with the number 0 adjoined.
Standard Symbol: W
Symbolic Form: W = {0, 1, 2, 3, 4, …}
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The question becomes which of the options indicates whole numbers less than 3. Note that 3 is not less than itself so it will not be included.

C. D = {0,1,2}; D = {x | x is a whole number, x < 3} --->

Suggestion: Go over to the site at the link given below and study up on names and contents of sets of numbers. It will help you solve future problems of this type.

http://www.drdelmath.com/special_topics/introduction_to_sets_files/sets_of_numbers.htm