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May 9th, 2009, 11:34 PM   #1
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Surface Integral

Evaluate the surface integral ??x^2+y^2 dS where ? is that portion of the plane z=4x+20 cut by the cylinder x^2+y^2=9

What I got is (81pi.sqaure root of 17)/2.Is that correct?
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May 10th, 2009, 04:21 AM   #2
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Re: Surface Integral

Looks correct.
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