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Math Help - Linear Approximation problem

  1. #1
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    Linear Approximation problem

    The revenue from the sales of a rare, limited-production luxury car are forecast by R(x) = 3,000,000(1-3/x) when x greater than or equal to 4. Use differentials to estimate the increase in revenue from the sale of one more car from a sales level of 5.
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  2. #2
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    Quote Originally Posted by McDiesel View Post
    The revenue from the sales of a rare, limited-production luxury car are forecast by R(x) = 3,000,000(1-3/x) when x greater than or equal to 4. Use differentials to estimate the increase in revenue from the sale of one more car from a sales level of 5.
    \Delta R \approx \frac{dR}{dx} \Delta x

    \Delta R \approx \frac{9000000}{x^2} \Delta x

    Now put \Delta x=1 and x=5

    CB
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