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Let vec(PR) = 3hati + hatj -2hatk and ve...

Let `vec(PR) = 3hati + hatj -2hatk and vec(SQ) =hati-3hatj - 4hatk` determine diagonals of a parallelogram PQRS. And `vec(PT) = hati + 2hatj + 3hatk ` be onther vector. Then the volume of the parallelepiped determined by the vectors `vec(PT), vec(PQ) and vec(PS)` is

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