00:01
We're being asked to find the first five terms in the given recursively defined sequence.
00:05
Well, they tell us that a sub 1 is equal to 1, so that's the first term.
00:08
And they tell us that a sub 2 is equal to 2.
00:10
So that's the second term in the sequence.
00:13
Now, to find a3, we need to substitute 3 in place of n in our formula.
00:18
So we're going to have a sub, well, 3 minus 1 is 2.
00:21
So we have a sub 2 times, and then we'll have a sub 3 minus 2, which is equal to 1.
00:26
So we need to multiply a sub 2 by a sub 1.
00:29
Well, a sub 2 is equal to 2, and a sub 1 is equal to 1, and 2 times 1 is equal to 2.
00:35
So the third term in this sequence is 2...