Question -
Answer -
Let points (тАУ2, 3, 5), (1, 2, 3), and (7, 0, тАУ1) be denoted by P, Q, and R respectively.
Points P, Q, and R are collinear if they lie on a line.
┬а
Here, PQ + QR
┬а= PRHence, points P(тАУ2, 3, 5), Q(1, 2, 3), and R(7, 0, тАУ1) are collinear.