You are Here: Home >< Maths

prove AnB=BnA without a venn diagram? watch

1. how do i prove AnB=BnA without using a venn diagram??
2. You're going to have to give us your definition of AnB.
3. there is no definition
that is the question, im well confused lol!
anyone...
5. Area A intersect area B?

A statistics question?
6. yeah.. i suppose
why is that relevant? lol
7. (Original post by Bec..)
there is no definition
Then there's no question. If AnB hasn't been defined, you can't really know what you're trying to prove.

I'd define AnB as {x : x is in A and x is in B}. Can you prove it from there? (To show that two sets C and D are equal, you should show separately that every x in C is also in D, and every y in D is also in C.)

Related university courses

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: January 18, 2010
Today on TSR

How do you think you'll do?

University open days

Wed, 25 Jul '18
2. University of Buckingham
Wed, 25 Jul '18
3. Bournemouth University
Wed, 1 Aug '18
Poll
Useful resources

Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

How to use LaTex

Writing equations the easy way

Study habits of A* students

Top tips from students who have already aced their exams

Chat with other maths applicants