I need some help on this problem: Prove that the projection into the xy plane of the intersection of the plane z = y and the paraboloid z = x^2 + y^2 is a circle
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Originally Posted by messianic I need some help on this problem: Prove that the projection into the xy plane of the intersection of the plane z = y and the paraboloid z = x^2 + y^2 is a circle Substitute into the to get . Completing the square gives , which is a circle. Does this make sense?
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