Finite Set and Empty Set

Basic Concept

Finite and Infinite Set

 

Finite set 

The element can be listed (limited)

 

Example:

  • The set of all persons in your class
  • Whole numbers between 5 and 45
  • Natural numbers less than 30

 

 

Infinite set

The element cannot be listed (unlimited)

 

Example:

  • Set of all point in a line segment
  • Set of all natural numbers
  • Set of all integers

 

Empty Set or Not

 

Null or empty set 

Set with no elements 

 

Example:

The sets of triangles having 4 sides

It is an empty set, because every triangle has 3 sides

 

 

Not an empty set 

Set with elements 

 

Example:

The set of even prime number

It is not an empty set, because even prime number is 2.

{2}

 

(Next Lesson) Question 01
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