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Let vecu, vecv and vecw be three unit ve...

Let `vecu, vecv and vecw` be three unit vectors such that `vecu + vecv + vecw = veca, vecuxx (vecv xx vecw)= vecb, (vecu xx vecv) xx vecw= vecc, vec a.vecu=3//2, veca.vecv=7//4 and |veca|=2`
Vector `vecu` is

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