CBSE Class 11 Mathematics Three Dimensional Geometry Notes

Question. The distance of the point (2, 1, –1) from the plane x − 2y + 4z = 9 is: a. √13/21 b. √13/21 c. √13/21 d. √13/21 Answer : C Question. A unit vector perpendicular to plane determined by the points P(1, –1, 2), Q(2, 0, –1) and R(0, 2, 1) is: a…