show that the line passing through the points (1,-1,2) and (-2,1,2) is always perpendicular to z-axis
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The line through (1-1,2) and (-2,-1,2)is always perpendicular to z-axis. Related ... The equation of the line passing through the point (1,2) and perpendicular. play ... Show that the line thorugh the points (1,-1,2) and.
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