# Using Vectors ,prove that the points ( 2, -1 , 3 ) , ( 3, -5 , 1 ) and ( -1 , 11 , 9 ) are collinear.

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Using Vectors ,prove that the points ( 2, -1 , 3 ) , ( 3, -5 , 1 ) and ( -1 , 11 , 9 ) are collinear.