 Hello and welcome to the session. Let's work out the following problem It says the cost function Cx of a firm is given by Cx is equal to 2x square minus 4x plus 5 Find the average cost and The marginal cost when x is equal to 10. So let's now start the solution the cost function Cx is 2x square minus 4x Plus 5. Now the average cost is given by Cx upon x. So this is equal to 2x square minus 4x Plus 5 upon x. So this is equal to 2x minus 4 plus 5 by x. Now In the second part we have to find the marginal cost when x is equal to 10. Now the marginal cost is given by d by dx of Cx So d by dx of 2x square minus 4x plus 5 it is 4x minus 4 Now we have to find the marginal cost that is MC when x is equal to 10 So this is equal to 4 into 10 minus 4 that is 40 minus 4 that is 36 So this is the answer to the first part of the equation and this is the answer to the second part of the question and this completes the question The average cost is the first part of the question. So this is the answer to the first part of the question question and this is the answer to the second part of the question. So this completes the question and the session. Bye for now. Take care. Have a good day.