Let L 1 : 1 1 x − = 1 2 y − − = 2 1 z − and L 2 ; 1 1 x − + = 2 2 y − = 1 z be two lins. Let L 3 be a line passing through the point ( α , β , γ ) and be perpendicular to both L 1 and L 2 . If L 3 intersects L 1 , then |5 α – 11 β – 8 γ | equals :

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Let L 1 : 1 1 x − = 1 2 y − − = 2 1 z − and L 2 ; 1 1 x − + = 2 2 y − = 1 z be two lins. Let L 3 be a line passing through the point ( α , β , γ ) and be perpendicular to both L 1 and L 2 . If L 3 intersects L 1 , then |5 α – 11 β – 8 γ | equals :

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