00:01
If we want to find the marginal cost for the 10th byte to be produced, what we're going to do is first take the derivative, first to get our marginal cost equation.
00:13
So we'll take the derivative of this with respect to x.
00:17
And then we'd have c prime is equal to, well, the derivative of 60 is zero.
00:23
The derivative of 2x is going to be 2.
00:25
The derivative of x squared will use powerful, so we move the 2 out front, and then subtract one off the power, so we just get x, or 2x.
00:36
And then power rule again, move the three out front, so three times five is 15, subtract one off the power, so we have x squared.
00:43
And then we can go ahead just erase this zero here...