00:01
Let's take a look at what this equation means.
00:03
If i were to have some function, it doesn't really matter why.
00:06
Let's say this is my f of x, something like this.
00:10
And i choose some point a.
00:12
Say here's a.
00:15
This point right there, that's f of a.
00:21
Now, if i have some other point x, let's say we have, go over here and there's x, then this point right here is going to be f of x.
00:32
Now if i find the slope between these two points, it's going to be this purple line here, the slope of that line.
00:41
It looks like about zero in this case.
00:43
But what if x approaches a? x is going to get as close to a as possible...