Question: 1) Let u, U, w E R4. Show that R4 + span {u, v, w}. 2) Suppose A is a 3 x 3 matrix with

1) Let u, U, w E R4. Show that R4 + span {u, v, w}. 2) Suppose A is a 3 x 3 matrix with the property that Ax = b has a unique solution. Show that the three columns of A must span 3

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