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Ah, I am sorry, then.

Hi 123ronnie321I don't think that's true. Look at A={(1,0,0),(0,1,0)} and B={(1,0,0),(0,0,1)}, for example.

Let V be a vector space and A,B be subsets of V .prove that: span (A U B) = span (A) + span (B)looks pretty obvious but dont know how to prove it using math