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Example 3: Increasing Prices

Suppose the price z of steel is proportional to the population x divided by the supply y,

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x and y depend on time in such a way that

11_partial_differentiation-299.gif

Find the rate of increase in the price z when x = 1,000,000, y = 10,000.

11_partial_differentiation-300.gif

11_partial_differentiation-301.gif


Last Update: 2006-11-15