MATH 7

• a set is a well-defined collection if obejcts, such objects are called the element of the set
• In the roster method or listing method of describing a set, the elements of the set are listed between braces.
• In the rule method or the set-builder notation of describing a set, the property or properties that each element of the set satisfies are stated.
• The cardinality of a set refers to the number of elements in the set.
• A set has no elements is called an empty set or a null set
• describing a set, the elements of the set are listed between braces

  roster method and listing method
• if the cardinality or number of elements of a set is a counting number, then it’s called a finite set
• sets a and b are equal if they contain the same elements and a is a subset of b
• A welded collection of elements are called the elements of the set
• The property or characteristic of a set


  Refers to the number of elements of the set
• Cardinality of a set


  The number of elements of the set
• A set that has no elements

  Is called an empty set
• A set is finite


  If the cardinality of the set is a counting number
• A set is infinite


  If the cardinality of the set is not a finite counting number
• Sets A and B are equivalent

  If they contain exactly the same elements
• Sets A and B are equal

  If they have the same cardinality, symbols
• The union of sets A and B


  Is denoted as A U B
• Intersection


  The set that is all the elements common to two or more sets
• The property of the intersection of sets A and B, which is denoted as A∩B, is the segments that are common to both A and B
• A visual representation of logical relationship among sets is a Venn diagram
• If the closeness of P implies the closeness of Q, then P is a subset of Q
• NUO Elee, Tene
• Lee, Tine
• YOUR L
• Cardinality


  The number of elements in a set
• Qaid to be a Bonus
• Enumeration


  Listing or counting the elements of a set
• Commonly used methods to describe sets

  • Roster Method
  • Set-builder notation
• Kinds of Sets


  • Finite sets
  • Infinite sets
  • Empty set
  • Universal set
• TEST III-SOLVING

  1. Consider the following sets of athletes

  2. Find the elements of each union of sets
• STRICTLY NO ERASURE