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If vec(a)= 3 vec(i)- vec(j)-2vec(k), vec(b)= 2vec(i) + 3vec(j) + vec(k), then (vec(a) + 2vec(b)) xx (2vec(a) - vec(b))= |
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Answer» `-25 vec(i) + 35 vec(J) -55vec(k)` |
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