Hello, can someone help me get started on this? How can i show that u = (-1,1,0,2) is orthogonal to the subspace spanned by the vectors w1=(0,0,0,0) w2=(1,-1,3,0) w3=(4,0,9,2) how would I set this up.. Thanks!
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That is, a vector is orthogonal to the span of a set of vectors if and only if it is orthogonal to each vector in the set.
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