Question

what is the difference between an intersection and a union?

Answer 1

an intersection means and and a union means or

Answer 2

Please look up both terms on the 'Net. Then we can discuss them individually and contrast them.

Answer 3

so an intersection is like a combination of a set of numbers, right?

Answer 4

or 2 sets of numbers?

Answer 5

If you're asking me, arby-j, then I doubt y ou've looked up these terms as I've asked you to do so.

look up "union of a set."
then
look up "intersection of a set"

Answer 6

hint: http://xoax.net/math/crs/algebra/lessons/Lesson1/Image4.png
or http://seniorsecondary.tki.org.nz/var/tki-sec/storage/images/media/images/venn-diagrams/28403-1-eng-NZ/Venn-diagrams.png

Answer 7

Very good diagrams. We'll discuss verbally what union and intersection mean. But first, arbyj, please look up both terms yourself and share the basics of what y ou find.

Answer 8

What verbal description do you find of a "union of two sets?"

Answer 9

i looked up the definition of intersection first, and i'm trying to understand it

Answer 10

before i get to union

Answer 11

fine, look up "intersecton" of 2 sets first.

Answer 12

before i get to union

Answer 13

A=(1,2,3),B=(0,5,1)

Answer 14

So, what would be the intersection of sets A and B?

Answer 15

First, explain what "intersection" means, in your own words.

Answer 16

The intersection of two sets of numbers is ...... ?

Answer 17

what exactly are you trying to know

Answer 18

is it like a combination?

Answer 19

i know intersection is and the union is or but what is the difference other than that?

Answer 20

No, it's not. If I step on your toe, the overlap of our shoes would be an "intersection." better go back and do a bit more reading on"intersection."

Answer 21

"combination" is not the right word here.

"intersection" refers to any elements that the 2 sets have in common.

Type out the 2 sets again: A:

B:

What element have they in common?

Answer 22

A=(1,2,3),
B=(0,5,1)
1

Answer 23

I do expect you to be able to explain in your own words what the intersection of 2 sets means and what the union of 2 sets means.

Right. the intersection is {1}.

What about the union?

Answer 24

The only overlap of A and B is {1} . Note the word "overlap." Were I to step on your toe with my toe, the "intersection would be the small part of my sole that touches the top of your shoe.

Answer 25

so the union would be putting the numbers together, right? @mathmale

Answer 26

We need to use careful wording here. We're not "putting the numbers together," but rather are looking for any number or number that is in one of the sets or the other or both.

What are A and B again? Take all of the elements of A and all of the elements of B (but no duplicates) and write a new set. That new set will be the "union" of A and B.

Answer 27

uh A=(1,2,3) B=(0,5,1)

Answer 28

@mathmale

Answer 29

The union of A and B is the set of all members of both sets, but NO duplicates, please.

Try it. Write out the members of set A and then the members of set B. Eliminate any duplicates. What's left is the union of sets A and B.

Answer 30

okay i think i understand union now, thanks :)