1.

Let A,B,C,D are any four points in space. If ∣∣∣−−→AB×−−→CD+−−→BC×−−→AD+−−→CA×−−→BD∣∣∣=λ×(Area of △ABC), then the value of λ is:

Answer»

Let A,B,C,D are any four points in space. If ∣∣∣−−→AB×−−→CD+−−→BC×−−→AD+−−→CA×−−→BD∣∣∣=λ×(Area of △ABC), then the value of λ is:



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