sorry wrong place
Last edited by donnyA; May 10th 2008 at 04:35 PM.
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Did you mean 'a' instead of 's'?. If so, I think we can use: $\displaystyle \int_{-2}^{2}\int_{-\sqrt{4-x^{2}}+2}^{\sqrt{4-x^{2}}+2}\int_{0}^{ay}dzdydx=8a{\pi}$ $\displaystyle 8a{\pi}=4\pi$ $\displaystyle a=\frac{1}{2}$
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