. . The coordinates of the image of a point in a plane Let ( a a a be the point u whose image in the plane is required. Then ˆ u a i a j a k Let ax by cz be the equation of the given plane.Writing the equation in the vector form we get r n where ai bj ck .Then the position vector of the image is u v u If ˆ v v i v j v k , then v a α v a α v a α where p aa ba ca Example .
Find the image of the point whose position vector is in the plane