00:01
So we're giving this universal set.
00:03
That is the digits, the integers going from 1 to 9, 6, 7.
00:15
Let me just double check.
00:16
I'm not missing anything.
00:18
1, 2, 3, 4, 5, 6, 7, 8, 9.
00:20
And then they also give you the set.
00:23
I'm just going to call it set a, just so i have something to define as 3, 5, 7, 8.
00:36
And so the thought process is they're asking you for the complement.
00:43
And there's a couple ways you can think about this, but what it shakes out to is if we were to take the union of a and its complement, it should equal the universal...