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

Show that the point A(-2, 4, 7), B(3, -6, -8) and C(1, -2, -2) are collinear.

Show that the points A(1, -2, -8), B(5, 0, -2) and C(11, 3, 7) are collinear, and find the ratio in which B divides AC.

Show that the points A(5, 4, 2), B(6, 2, -1) and C(8, -2, -7) are collinear.

Using section formula, show that the points A(1, 2, 1), B(2, 1, 0) and c(7/5, 8/5, 3/5) are collinear.

Using section formula, prove that the points A(-2, 3, 5), B(1,2,3) and C(7,0, -1) are collinear.

Using section formaul, show that the points (2, -1, 3), (0, 1, 2) and (2/3, 1/3, 7/3) are collinear.

Using direction ratios show that the points A(2,3,-4), B(1,-2,3) and C(3,8,-11) are collinear.

Prove that the point A(1,2,3), B(-2,3,5) and C(7,0,-1) are collinear.

Using slopes, show that the points A(6, -1), B(5, 0) and C(2, 3) are collinear.

(i) Using section formula, show that the points A(-2, 3,5), B(1,2,3) and C(7,0,-1) are collinear. (ii) Using division formula, prove that the points (2,3,4),(-1,-2,1) and (5,8,7) are collinear.