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2. Show that if z f(r, 0), wherer and 0 are defined as functions of r and y by the equations r = r

2. Show that if z f(r, 0), wherer and 0 are defined as functions of r and y by the equations r = r cos 0 and y = r sin 0, then the equation 0 becomes %3D ? 1dz + = 0. (10pt) %3D p2 302 r dr

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