40. Let H = Span {V₁, V2, V3} and B = {V1, V2, V3}. Show that B is a basis for H and x is in H, and find the B-coordinate vector of x, for -3 -0-0-0-0 = V3 = 7 -3 = -6 -9 L 4 -9 5 -8 3 ,X = 4 7 -8 3

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