Question

The Total cost function is given by C = 2x2 + 4x + 25. Find total cost, Marginal Cost and Marginal Average Cost when x
= 10
​

Answer 1

⇒ We have, C(x)=2x

2

−4x+5.

⇒ Average cost =

x

C(x)

⇒ Average cost =

x

2x

2

−4x+5

⇒ Average cost = 2x−4+

x

5

⇒ Now, substitute value of x=2.

⇒ Average cost = 2(2)−4+

2

5

=

2

5