00:01
We're being asked to find the first five terms in the recursively defined sequence.
00:06
So a -sub -1 is our first term, so it's negative 2.
00:10
So now we know the first term.
00:11
To find our second term, we're going to substitute 2 in place of n in our a -sub -n formula.
00:17
So when we do this, we're going to have 2 plus, well, then we're going to have a -sub -2 -1, which is simply just 1.
00:23
And remember, we already know a -sub -1 is negative 2.
00:27
So we're going to have 2 plus negative 2, which is equal to 0.
00:32
Now, let's find a sub 3, the third term.
00:35
We're going to substitute 3 into our a sub -n formula.
00:38
So when we do that, we're going to have 3 plus a -sub -2...