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Math Help - Surface Area Problem - 5

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    Surface Area Problem - 5

    The given curve is rotated on the y axis. Find the surface area.

    y = \dfrac{1}{4}x^{2} - \dfrac{1}{2}\ln x

    Interval: 2 \leq x \leq 5

    How can I convert the "y =" function to an "x =" one, or is there some special way? Also, the interval has an x in the middle, but if were rotating on the y axis, then it should have a y.
    Last edited by Jason76; July 20th 2014 at 12:47 AM.
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