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An economist is interested in how the price of a certain item affects its sales. At a price $p, a quantity, q, of the item
An economist is interested in how the price of a certain item affects its sales. At a price $p, a quantity, q, of the item is sold. Suppose q = f (p).
(a) Explain the meaning of f (150) = 2000.
(b) Explain the meaning of f 0 (150) = 25.
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