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Show that the points (2,3,4), (-1,-2,1), (5,8,7) are colinear |
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Answer» Then the direction ration of AB are -1, -2, -2, -3, 1-4 i.e., -3, -5, -3 and the direction ratios of AB are 5, -2, 8-3, 7-4 i.e., 3, 5, 3 Since `(-3)/3=(-5)/5=(-3)/5`, the direction ratios of AB and AC are proportional. Thus A, B and C are COLLINEAR |
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