VectorHard
Question
If the position vectors of three points A, B, C are respectively î + ĵ + 
, 2î + 3ĵ − 4
and 7î + 4ĵ + 9
, then the unit vector perpendicular to the plane of triangle ABC is-
, 2î + 3ĵ − 4 and 7î + 4ĵ + 9, then the unit vector perpendicular to the plane of triangle ABC is-Options
A.31î − 18ĵ − 9
B.
C.
D.-None of these
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