00:01
All right, you're given this universal set and then the sets a, b, and c.
00:06
And in this problem, you don't even need to know what the universal set is.
00:10
You only need it when you're doing the conjugate of the set, like a prime or a bar, depending on what your book is.
00:20
Okay, so what they want you to do is make a new set, and this new set is called a intersect b, union c.
00:26
And you do what's in the parentheses first.
00:30
So a, intersect b.
00:33
Okay, so think about the upside down one, which is intersect.
00:37
The same thing as intersect means when you're talking about streets.
00:41
So suppose this was main street and first street or whatever, and i said, go stand in the intersection.
00:48
Well, you would stand right here, okay, because that is the place that is on both main street and first street.
00:57
So intersect means the things that in both of them, what they have in common.
01:06
Okay, so look at a and b and see what they have in common.
01:09
They both have a g and they both have an i.
01:14
So that's the intersection, g .i...