Question

Q. 22) If the cost function is C-2xl-5x+7 then the marginal cost at x-5
is
a)10
b)15
c)20
d)25​

Answer 1

Answer:

Correct option is

C

16

⇒ We have, C(x)=3x

2

−2x+3

⇒ Marginal cost =

dx

d

C(x)

⇒ Marginal cost =

dx

d

(3x

2

−2x+3)

⇒ Marginal cost = 2×3x−2=6x−2.

⇒ Now, substitute value of x=3,

⇒ Marginal cost = 6×3−2=18−2=16