a, b, c are non-coplanar vectors. Prove that the following four points are coplanar.
-a + 4b - 3c, 3a + 2b - 5c, - 3a + 8b - 5c, -3a + 2b + c.
(ii) 6a + 2b - C, 2a - b + 3c, - a + 2b - 4c, -12a - b - 3c.
directions of the coordinate gyes then show
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Given A, b, c are non-coplanar vectors. Prove that the following four points are coplanar.
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