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# Let $OA,OB,OC$ be the co-terminal edges of a rectangular parallelopiped of volume V and let P be the vertex opposite to O. Then $[\overrightarrow{AP} \overrightarrow {BP} \overrightarrow {CP} ]=$

$\begin {array} {1 1} (1)\;2V & \quad (2)\;12 V \\ (3)\;3 \sqrt 3 V & \quad (4)\;0 \end {array}$

(1) 2V

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