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Math Help - washer method

  1. #1
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    washer method

    Find the volume of the solid formed by revolving the region under the graph of
    f(x)=9-x^2 for 0<x<3 about the line x=-2 using the washer method.
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  2. #2
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    \pi \int_{f(0)}^{f(3)} (f^{-1}(x))^2dx - \pi \int_{f(0)}^{f(3)} (2)^2dx
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  3. #3
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    whatd is f^-1(x) derivative?
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