00:01
If a sub n equals n factorial over 2n plus 1, and we want to find the first five terms, then the first term would be 1 factorial over 2 times 1 plus 1.
00:24
1 factorial is 1, 2 times 1 is 2 plus 1 is 3.
00:27
So the first term is 1 3.
00:36
Actually, i just caught that the first term we're assuming is that n begins with 0.
00:42
So this would be actually a sub 0, a sub 1, a sub 2, a sub 3, and a sub 4.
00:54
So a sub 0, the first term would be 0 factorial over 2 times 0 plus 1.
01:01
0 factorial is actually 1.
01:07
And that's by the definition of factorial...