Introduction to Set

Introduction to Set

Allen Iverson Elpedama

SET

is a well-defined group of objects

Multiple Choice

1. Which of the following is written in set?

• 2,3,4,5

• (a,e,i,o,u)

• {5,10,15,20}

• (2,4,6,8}

Multiple Choice

Which of the following are well-defined set?

• The collection of beautiful flower

• The collection of stars in the sky

• The set of planets in the solar system

SUBSET

A subset is a set whose elements are all members of another set. The symbol "⊆" means "is a subset of". The symbol "⊂" means "is a proper subset of".

Multiple Choice

If U = {1, 3, 5, 7, 9, 11, 13}, then which of the following are subsets of U.

• C = {1, 9, 5, 13}

• F = {2, 3, 4, 5}

Multiple Choice

It is a set without any element.

• sunset

• unit set

• subset

• null set

Null or Empty Set

is the set that does not contain anything. It is symbolized or { }.

Element of a Set

An object or idea in a set is called an element (or member) of the set. Notation: The symbol ∈ is used to denote that an element is a member of a set and ∉ is used to denote that an object is not a member of a set.

SUBSET

A subset is a set whose elements are all members of another set. The symbol "⊆" means "is a subset of". The symbol "⊂" means "is a proper subset of".