1.

If →a,→b,→c,→d are non-zero vectors satisfying →a=→b+→c,→b×→d=→0 and →c⋅→d=0 , then →d×(→a×→d)|→d|2 is always equal to

Answer»

If a,b,c,d are non-zero vectors satisfying a=b+c,b×d=0 and cd=0 , then d×(a×d)|d|2 is always equal to



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