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9.7 - Reading questions
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<h2>[9.7] - Reading Assignment
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<p>After reading section 9.7...
<ol><li>State a reason for introducing different coordinate systems for 3 dimensional space, or give an example in which using some different system is much *easier* than using Cartesian coordinates.
<li>Describe the surface (in 3 dimensions, in cylindrical coordinates)  given by the equation $\rho = 3$.
<li>Muddy questions? Questions you wonder about?
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