Show that the points A(1,2,3) , B(4,0,4), C (-2,4,2) are collinear

Show that the points A=(1,2,3),B=(7,0,1), C=(-2,3,4) are colinear.

Show that the points A(3,-2,4),B(1,1,1),C(-1,4,-2) are collinear.

Show that the points A(1,2,7),B(2,6,3) and C(3,10,-1) are collinear.

Show that the point (1 , 2 , 3), (7 , 0 1), (- 2, 3, 4) are collinear.

Show that the points (-1,0,7),(3,2,1) and (5,3,-2) are collinear.

Show that the points (2,3,-4), (1,-2,3) and (3,8,-11) are collinear.

Show that the points A(3,2,-4),B(5,4,-6) andC(9,8,-10) are collinear and find the ratio in which B divides bar(AC) .