The revenue function is given by $R(x) = 100x – x^2 – x^3$. Find the marginal revenue function.
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → $MR=100−2x−3x^2$
The marginal revenue function = $MR=\frac{d}{dx}(R(x))$
$=\frac{d}{dx}(100x - x^2-x^3) = 100-2x-3x^2$.