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Unformatted text preview: ( x ) < 0 on∞ < x < 1. Application: Point of diminishing return The value of x where the rate of change of f ( x ) changes from increasing to decreasing is called the point of diminishing return . Example 3. A discount appliance store is selling 200 largescreen TV sets monthly. If the store invests $x thousand in an advertising campaign and the ad company estimates that sales will increase to N ( x ) = 4 x 3. 25 x 4 + 500 , ≤ x ≤ 12 . When is rate of change of sales increasing and when is it decreasing? What is the point of diminishing returns and the maximum rate of change of sales? 2...
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This note was uploaded on 09/04/2010 for the course MATH MATH006 taught by Professor Forgot during the Fall '09 term at HKUST.
 Fall '09
 forgot
 Math

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