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If |veca|=2 and |vecb|=3 and veca.vecb=0...

If `|veca|=2 and |vecb|=3 and veca.vecb=0, " then " (vecaxx(vecaxx(vecaxx(vecaxxvecb))))` is equal to the given diagonal is `vecc = 4 hatk = 8hatk` then , the volume of a parallelpiped is

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