Q25Long answer
Show that the points (iˆ − ˆj + 3kˆ) and 3(iˆ + ˆj + kˆ) are equidistant from the plane r .(5iˆ + 2 ˆj − 7 kˆ) + 9 = 0 and lies on opposite side of it.
Show that the points (iˆ − ˆj + 3kˆ) and 3(iˆ + ˆj + kˆ) are equidistant from the plane r .(5iˆ + 2 ˆj − 7 kˆ) + 9 = 0 and lies on opposite side of it.