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জোড়া-১: ( vec A =3 hat i -m hat j +4 hat k ) এবং ( vec B =4 hat i +4 hat j - hat k ) জোড়া-২: ( overrightarrow p =7 hat i +2 hat j +2 hat k ) এবং ( overrightarrow Q =n hat i -10 h | Suva Ai