0:00
All righty.
00:01
We just want the fourth term.
00:04
So if we remember our rule when we want a specific term, we're going to call that term k.
00:11
And wherever we see r, we're going to substitute it for k minus 1.
00:17
So if we want the fourth term in the situation, we're going to say k equals 4.
00:23
So i'm going to plug everything in.
00:25
N is going to be 10, 10 factorial over 4 minus 1.
00:32
Factorial over or times 10 minus 4 minus 1 factorial and then we'll have x to the 10 minus 4 minus 1 and y to the 4 minus 1.
00:54
So let's go ahead and start simplifying this up a little bit.
00:58
We get 10 factorial over 3 factorial and then 4 minus 1 is 5, 10 minus 5.
01:07
Five factorial...