Activity (Process)

Expressing Profit as a Function of Quantity (Q) Using the Substitution Method

A straightforward mathematical technique to solve the firm's profit maximization problem is the substitution method. This approach involves taking the demand curve equation, which acts as the constraint (P=f(Q)P = f(Q)), and substituting the expression for price (P) into the profit equation (Π=PQC(Q)Π = P*Q - C(Q)). The result is a new equation that expresses the firm's profit as a function of a single variable, quantity (Q).

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Updated 2026-05-02

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Introduction to Microeconomics Course

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