00:01
We're being asked to find the first five terms for this given recursively defined sequence.
00:05
Well, they tell us the first term, a sub 1 is equal to 3.
00:10
Now, to find the second term, we have to substitute 2 in place of n in our a sub the n formula.
00:16
Well, that would give us 4 minus a sub, well, 2 minus 1 is simply 1.
00:23
Remember, a sub 1 was equal to 3.
00:26
So we just need to do 4 minus 3, which is equal to 1.
00:29
So the second term in the sequence is 1.
00:32
Now, let's find the third term.
00:34
So to find a.
00:35
3, we'll substitute 3 and for n in our a sub n formula.
00:39
So we have 4 minus, well, 3 minus 1 is 2.
00:42
So we have 4 minus a sub 2.
00:44
But remember, we just found a sub 2 is equal to 1...