Question: Quick explanation please. Again consider the surface given by the equation x2+y2-422= 'I. The intersection of the surface with the xzplane is: O a pair

Quick explanation please.

Again consider the surface given by the equation x2+y2-422= 'I. The intersection of the surface with the xzplane is: O a pair of lines that cross once. 0 a circle of radius 2. O a parabola. O a hyperbola. O a circle of radius 1. O a single point

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