10. if the lines l, :x=i +21, y=2-, z4-2t and l:x=9+, y=5+ 3t, z=4-t intersect at (a, -1, -2), find a. 10.3: arc length for cartesian curve ntanal then flie eai

10. If the lines L, :x=I +21, y=2-, z4-2t and L:x=9+, y=5+ 3t, z=4-t intersect at (a, -1, -2), find a. 10.3: Arc length for cartesian curve ntanal then flie eaid to he continuous