Q. 22) If the cost function is C-2xl-5x+7 then the marginal cost at x-5isa)10b)15c)20d)25 About the author Alice
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 Reply
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