06-02-2017
Mathematics

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xy=7, x=0, y=7 and y=9 revolves around the x axis

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LammettHash LammettHash

06-02-2017

With shells, the volume is given by

[tex]2\pi\displaystyle\int_7^9\frac7y\times y=14\pi\int_7^9\mathrm dy=28\pi[/tex]

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