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Write down the parametrized surfaces as level surfaces {f(x,y,z)=0}. x=ucosv, y=usinv, z=u, 0 <= u <=...

Write down the parametrized surfaces as level surfaces {f(x,y,z)=0}.

x=ucosv, y=usinv, z=u, 0 <= u <= 2, 0 <= v <= 2pi

x = 2cosu*cosv, y = 2cosu*sinv, z = 2sinu, 0 <= u <= 2pi, 0 <= v <= pi

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