mathway test 1
Set A is a proper subset of set B, expressed as
A⊂ B (means that set A is a subset of set B and sets A and B are not equal)
Set A is a subset of set B, expressed as ______
A⊆B (means that every element in set A is also an element in set B)
The statement ∅⊆ B tells us that the empty set is
a subset of every set
The number of distinct elements in a set is called the ________ number of the set. If A represents the set, this number is represented by ______
cardinal, n(A)
The symbol is an element of ∈ is used to indicate that an object is an ∅"______ of a set.
element
A set that contains no elements is called the _______ set and is represented by ______
empty/null, ∅ or {}
Two sets that contain the same elements are called ______ sets.
equal
Two sets that contain the same number of elements are called ______
equivalent
The set {1,2,3,4,5,...} is called the set of _______.
natural numbers
proper sets mean they are
not equal
The set {California, Colorado, Connecticut} is expressed using the ______ method. The set {x|x is a U.S.state whose name begins with the letter C} is expressed using ______-
roster method, set builder notation
