Loading presentation...

Present Remotely

Send the link below via email or IM


Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.



No description

R Sheehan

on 3 September 2014

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of Sets

A set is a
clearly defined
collection of objects.

For something to be clearly defined, it means that there is no doubt that an
belongs to a given set.
The days of the week

The students in the class
An element is an item within a set.
The members of One Direction =
{ Niall Horan, Zayn Malik, Liam Payne, Harry Styles, Louis Tomlinson }
The best members of the Xmen are =
{ Cyclops, Beast, Storm }
Are these sets clearly defined?
Inside a set, we only list elements once.
"The letters of the word NAVAN could be listed in set form as
{N, A, V}, that is, no letter is repeated."

Textbook, page 73
Exercise 5.1

1. Say whether each of the following could be accurately described as a mathematical set:

(i) The counties of Leinster
(ii) The players on my football team
(iii) The tall pupils in my class
The elements within a set
1. symbol ϵ

2. Define by a rule

A = { Simon Cowell, Cheryl Cole, Louis Walsh, Mel B }

What is the rule here?
3. The null set is the set containing no elements.

The null set is denoted

-with set brackets without any elements inside
{ }
- or with the following symbol
Exercise 5.2
Q. 2
A = {x, y, z}, B = {3, 6, 9, 12}

Are the following true:

3 ϵ A

6 ϵ B
Let A = { M, A, T, H, E, I, C, S }
and let B = { T, A, M, I, C, S, E, H}

What can we say about these two sets?
Definition: Set B is a subset of Set A if every element of B is also an element of A.

We use the symbol to denote a subset.
Full transcript