4. (a) A = (2, 3) y C = (−2, 1) no pertenecen a la recta. B = (3, 1) pertenece a la recta. (b) A = (4, 3), B = (0,−3), C = (2, 0) y D = Ä 2 5 ,− 12...
4. (a) A = (2, 3) y C = (−2, 1) no pertenecen a la recta. B = (3, 1) pertenece a la recta. (b) A = (4, 3), B = (0,−3), C = (2, 0) y D = Ä 2 5 ,− 12 5 ä .
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