Three Dimensional Co-ordinate Geometry

10.3 Plane and Equation of Plane. A vector perpendicular to (or orthogonal to) a plane is a normal vector o that plane. In Figure, is a normal vector of the plane . Normal vector of a plane is not unique, for if is a normal vector, then (a is any non-zero real number) is also a normal vector. Let be a fixed point and be any point on it. Set i.e. ................
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