00:01
Okay, so this question we have a is equal to a, b, c, d, and we want to first figure out how many different relations are on this set.
00:09
So first, let's think about all the possible number of ordered pairs there are.
00:13
Well, there are four, let's just do e and f.
00:19
There are four possible numbers that can go here, and there are three possible ones left, so four possible ones that can go here, because you can replace them.
00:27
So for example, a and a works.
00:29
So then the number of total, total number is going to be 16.
00:33
There are 16 total ordered pairs.
00:37
Now to build our set, for each ordered pair, this pair can be in our set or not be in our set.
00:45
So for example, a, a, a, b and b, we can this set can either be, sorry, this pair can be in our set or not, this pair can be in our set or not, this pair can be in our set or not, and so on, so on...