00:01
So one way to write this is a sequence.
00:01
In my first row, i have 20 seats.
00:04
In my second row, i have 22 seats.
00:08
In my third row, i have 24 seats, and so on and so forth.
00:14
Then until i get to my 25th row.
00:18
Okay.
00:19
So this is kind of like a sequence.
00:21
Each row i'm adding by two.
00:23
So if i were to write this as an explicit formula, write my sequence as fn equals my starting value.
00:28
I start with 20 plus.
00:30
My common difference, i'm adding 2 times n minus 1.
00:34
And it's times n minus 1...