If the points (–1, 3, 2), (–4, 2, –2) and (5, 5, λ ) are collinear, then λ =
– 10
5
-5
10
−4+15+4=2−35−2=−2−2λ+2orλ+2=12 or λ=10.
If the lines x−21=y−31=z−4λ and x−1λ=y−42=z−51 intersect, then-