00:01
Suppose this sequence is defined by the following.
00:03
Let's break down when it's defined by a sub 1 is 20.
00:05
Okay, this just means that my first term, when i plug in 1 into the equation, is going to be 20.
00:13
Okay, so my first term, a sub 1 is 20.
00:15
Already found my first term.
00:16
I just need to find my other terms.
00:18
Now i have a sub n, maybe the next term, equals a sub n minus 1.
00:22
This also known as the previous term, all over whatever number step term i'm on squared.
00:30
Okay, so then a sub 2, for example, would be the previous term, a sub 1, which is 20, over, i'm on my second step squared.
00:38
This is just the same thing as 20 divided by 4 or 5...