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If vec a\ a n d\ vec b are two non col...

If ` vec a\ a n d\ vec b` are two non collinear unit vectors such that `| vec a+ vec b|=sqrt(3),\ `find`\ (2 vec a-5 vec b). (3 vec a+ vec b) `

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If vec a and vec b are two non-collinear unit vectors such that | vec a+ vec b|=sqrt(3), find (2 vec a-5 vec b). (3 vec a+ vec b) .

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