Introduction to Sets

Multiple Choice

What does this symbol represent? $$\subseteq$$  

• Empty Set

• Subset

• Null Set

• Union

Multiple Choice

Which of the following represents this symbol? $$\supseteq$$  

• Intersection

• Empty Set

• Subset

• Not an element of

Multiple Choice

Each object in a set is called

• Element

• roster

• intersection

• union

The Purpose of Sets

•To help us keep things in order.

•​The basis of all mathematics

•​Provide us with a visual.

•​Help organize data​

Membership

​Fact 2

Well Defined.

​Fact 1

SET – A Method to Sort and Classify objects into a Well- Defined Collection

Sets are written in 3 ways

• Roster Notation

• Verbal Description

• SET Builder Notation​

Multiple Choice

Set D is the set of the distinct letters in the word mathematics. Write the set using the Roster method.

• D = {m, a, t, h, e, m, a, t, i, c, s}

• D = {m, a, t, h}

• D = {m, a, t, h, e, i, c, s}

• D = {m, a, t, h, i, c, s}

Multiple Choice

Set C is the set of whole numbers less than 9. Which of these is the correct C?

• C = {1, 2, 3, 4, 5, 6, 7, 8, 9}

• C = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}

• C = {1, 2, 3, 4, 5, 6, 7, 8}

• C = {0, 1, 2, 3, 4, 5, 6, 7, 8}

Open Ended

Write a verbal description using "The Set of...."

Open Ended

Write a verbal description using "The set of..."

What would be the answer to your description?

Multiple Choice

In set notation, the infinity symbols are not used. Instead "_____" is used to represent a graph that uses all real numbers.

• R

• Z

• I

• A

Multiple Choice

Which method is used to designate the set { x | x ∈ N and x > 4 } ?

• Roster Method

• Descriptive Method

• Set-builder Notation

Multiple Choice

Write this set A in roster form A = { x | x ∈ N and x > 4 } ?

• A = { 5, 6, 7, . . .}

• A= {4, 5, 6,7, ...}

• A= {1,2,3,4}

• A= {1,2,3,4, ...}

​Find an example of the following

Roster Set

Verbal Set

Set Builder notation​

​Exit Ticket