1. Introduction to Sets

2. Introduction to Sets Sets naturally follow the unit for inequalities
Universal: All the possible elements of a given set.
Denoted by “U”
Any other letter will be a subset.
Subset denoted by sideways u.

3. Introduction to Sets Union between two sets:
Denoted by “U”
Contains one of every element that appears in any of the given subsets
Intersection between two sets:
Denoted by “∩”
Contains only the elements that are in common between two subsets

4. Introduction to Sets Elements of sets: Denoted by “E”
An element occurs in a given set or subset.

5. Introduction to Sets Example: Universal Set U {1,2,3,4,5,6,7,8,9,10}
Subset A {1,3,5,7,9}
Subset B {1,2,3,5,}
Find A U B
Find A ∩ B
Is B a subset of A?