Question

let L1 be the line throught (1,-6,2) with direction vector (1,2,1) and L2 be the line throught (0,4,1) with direction vector (2,1,2).Detrmine Whether trh lines are parallel,intersec or skew.if intersec,find the point of intersec

Answer 1

first step, come up with the equations for the lines.
L1: (x-1)/1 = (y+6)/2 = (x-2)/1
L2: x/2 = (y-4)/1 = (z-1)/2

See what you can do with that.