00:01
Okay, b is the set containing the set 1, 2, the set 2, the set 2, the set 2, the set 2, and the set containing the empty set.
00:10
Evaluate the following sets.
00:12
We want the union of b.
00:15
So, the union of b is, you take the set containing 1, 2, union, the set containing 2, union, the set containing 2, 3.
00:27
Union, the set containing 1 and 3.
00:31
Union, the set containing the empty set.
00:36
So you just take the union of all the elements of b, and each element is a set containing something.
00:43
Okay, now the union of these sets is just going to be the set containing any element in any of these sets.
00:49
So one is in, two, three.
00:52
I don't relist like two appears twice, but i already have it in my set, so i only list it once.
00:58
And then the empty set is also in here.
01:00
Okay, so i have the set contained.
01:01
One, two, and three, and also the empty set.
01:05
Okay, part b, i want the intersection of b.
01:08
So i'm going to take the elements of capital b and intersect them now, which means now that i need to form the set containing elements that are in all of these sets...