-1 1 1 8 and A = 2 . Is u in the subset of vectors in R* spanned by Let u = 1 -2 -1 l1 1 5 the columns of matrix A? Give reason(s) for your response.

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A: For a,

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Q: -9 -10 12 -15 A = 4 -8 6 6 0 9

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Q: If a vector is in the range of a matrix A, then it is also in the null space of A. true of false?

A: Answer