W1-8: 6강. 해석기하:평면(Analytic Geometry of Planes)
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Q1. Find an equation for the plane defined by the three points (-1, -1, -1), (1,1,1), and (1, -1, 0). Determine the equation for the line in the xx-yy plane formed by the intersection of this plane with the z=0 plane.
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