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14p, Represent a 2D point (x,y) (참고1) by a 3D point (x’,y’,z’) by adding a “fictitious” third coordinate. Note: (x,y) = (x,y,1) = (2x, 2y, 2) = (kx, ky, k) for any nonzero k (can be negative as well as positive)

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2021/09/09 01:57
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1 more property
참고
2.