00:01
Hello, i have a question which says that i have to find the production level, production level that minimizes the average cost.
00:08
So cost function is given.
00:11
So average cost function will be cx by x, that is 400 by x plus 0 .05 plus 0 .00 to 5x.
00:26
Okay.
00:27
So let us say this is the cost function.
00:31
So let us say this is f x.
00:36
Now to minimize or maximize, f dash x should be equal to 0, 400 by x squared plus, oh, this was x, yes, plus 0 .0025 should be equal to 0.
00:56
So x square will be equal to 400 by 0 .0025.
01:03
So this is 400 divide by 0 .0025.
01:10
6 000 000 so x will be square root of this that will be 400 so for x equal to 400 it is minimized and minimum f dash 400 will be equal to 400 by 400 plus 0 .05 plus 0 .00 0 .05 into 400.
01:45
Okay, so this is 1.
01:53
F 400, sorry.
01:58
So that would be .0025 into 400 plus 1 minus 0 .05 $1 .95 in dollars.
02:13
Okay, part 6b.
02:18
Say that a commodity has a demand function modeled by p equal to is given.
02:24
And so revenue function will be x into p is 80x minus 0 .2x square...