Determine if the lines L1and L2 given below are parallelinte
Determine if the lines L_1and L_2 given below are parallel,intersecting or skew.If they are intersecting,find the intersecting point.
Solution
The slope of L1 is (3,-2,1) and the slope of L2 is (1,-5,-1)
Since these are not proportional to each other, the lines are not parallel
So, they are either skew or intersecting
To check whether they are intersecting or not, we need to check the existence of (t0, s0) such that
3t0 + 4 =s0 -1,
-2t0 -6 =-5s0 +6,
t0 + 4 =-s0 +5
On solving the above equations,we get
t0 =-1,s0 =2
So, the intersection point is (1,-4,3).
