00:01
We wish to find the critical numbers of this function here.
00:04
So the first thing that you need to remember is what a critical number is.
00:09
So the definition of a critical number is where the function, so our function here is g of e.
00:18
So where the derivative, meaning g prime of v is equal to zero, or where the derivative doesn't exist.
00:30
So that tells us the first thing that we need, to do is find the derivative of this function.
00:36
So that's going to be g prime of v.
00:40
So derivative of v to the power of 3 using the power rule is you would pull down the 3.
00:48
And then that would now be to the power of 2.
00:51
And then same thing, minus 75v.
00:54
So the derivative of that is just negative 75 because this v has a power of 1.
01:01
So once you pull it down it'll be to the power of zero...