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A line with direction cosines proportion...

A line with direction cosines proportional to 2,1,2 meet each of the lines `x=y+a=z and x+a=2y=2z`. The coordinastes of each of the points of intersection are given by (A) `(3a,2a,3a),(a,a,2a)` (B) `(3a,2a,3a),(a,a,a0` (C) `(3a,3a,3a),(a,a,a)` (D) `92a,3a,3a),(2a,a,a0`

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