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vec(a) is perpendicular to vec(b)+vec(c),vec(b) is perpendicular to vec(c)+vec(a)andvec(c) is perpendicular to vec(a)+vec(b). If |vec(a)|=2,|vec(b)|=3and|vec(c)|=6, then |vec(a)+vec(b)+vec(c)|-2=

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Answer :A


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