if a,b,and c are coplanar vectors, then find (2a-b,2b-c,2c- a)
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pls mark love
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Solution : ∵ a,b and c are coplanar vectors , so 2a-b,2b-c and 2c-a are also coplanar . Thus , [2a-b2b-c2c-a]=0 .
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