Example 4 Show that the points P (–2, 3, 5), Q (1, 2, 3) and R (7, 0, –1) are collinear. –1) are collinear. 2 3) and R (7 3% 5 Example 4 Show that the points P (–2 Q (1 October 30, 2021 Category: Chapter 12 - Introduction to 3D Geometry , Maths , [...]