00:01
Okay, if we have a, union, b, what it means is combine together the two sets, but don't repeat any elements.
00:10
So a union b must contain all of a, all of b, but no repeat elements.
00:17
So you see here we have 1, 2, 3, 4, 5, 7, 8, 9.
00:23
We have 6 here as well.
00:25
So i know it contains 1, 2, 3, 4, 5, 6, 7, 7, 7, 7.
00:31
8 and 9.
00:36
Then we have here 10, 11, 12.
00:44
13 is here as well.
00:49
And we have 14.
00:52
There's no 15.
00:54
There is 16, 17, and 19.
01:02
So that's a union b.
01:04
It's every number you see in either a or in b.
01:08
On a venn diagram, if i drew it, here will be a, here is b.
01:16
Anywhere inside the two circles is going to be a, union, b.
01:26
This one here, where a and b intersect, that means they overlap...