1. If a,b,c are non coplanar prove that the four points are coplanar.
i) -a+4b-3c, 3a+2b-5c, -3a+86-50 ,- 3a+2b+c​

1. If a,b,c are non coplanar prove that the four points are coplanar.
i) -a+4b-3c, 3a+2b-5c, -3a+86-50 ,- 3a+2b+c​

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