00:01
Hello everyone, there is a question given.
00:01
See, we have given, we have given p of x, that is thousand minus 12x and c of x that is 5 ,000 plus 6x.
00:21
Okay, in first we have to find total revenue total revenue that is x into px.
00:38
What is that? x into 10 minus 12x that is 1 ,000 minus 12x that is x minus 2 l x square okay in second we have to find total profit that is p of x r x minus c x okay that is thousand minus 12 x square minus 5 000 minus 600 x okay so what is that 400 x minus 12 x square minus 5 ,000 okay now in third part we have to find in third part we have to find r -dust x that is thousand minus 24 x so put r -dus x equal to 0 so from here we are getting x equal to thousand divide by 24 that is 1 -20 25 divided by 3.
02:09
So, x equal to 125 by 3 with the second derivative, test the critical number, taste this critical number, x equal to 125 by 3 with the second derivative.
02:46
So check this r double dash x equal to minus 24.
02:57
That is less than 0 so we are getting maximum so p of x equal to thousand minus 12 x so p of 125 divided by 3 equal to thousand minus 12l into 125 divide by that is 500 500 dollar per unit okay now for the fourth part now for the fourth part now for the fourth part p -dus x is equal to 400 minus 24 x so from here p double -dx x equal to minus 24 so for maximum p -dus x equal to 0 so x equal to 400 divided by 24 that is 50 divide by 3 so same test the critical point x equal to 5 50 by 3 with 2 derivative...