revenue and cost functions

Microeconomic Theory
12th Edition
ISBN:9781337517942
Author:NICHOLSON
Publisher:NICHOLSON
Chapter2: Mathematics For Microeconomics
Section: Chapter Questions
Problem 2.2P
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Question

A firm has the following revenue and cost functions.

TR = 120 Q – Q2

TC =  Q2 +30 Q + 10

Determine the quantity level at which the firm maximizes its total profit.

(Hint:  use marginal revenue = marginal cost rule)              

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