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