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Given the following pairs of lines, determine whether they are parallel, intersecting or skew, if they...

Given the following pairs of lines, determine whether they are parallel, intersecting or skew, if they intersect, find the intersecting and the plane containing them.

1) L1: (x-1)/1=(y-2)/1=(z-3)/-2 L2:(x-1)/1=(y-3)/0=(z-2)/-1

2) L1: x=t, y=-t,z=-1 L2: x=s, y=s, z=5

2) L1: (3+2x)/0=(-3+2y)/1=(6-3z)/2 L2: x=5/2, y=(3/2)-3t, z=2+4t

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