If A = [a1, a2, a3] has as columns the three vectors a1, a2, and a3. What is y = Ax, where x is a vector with three components, x1, x2, x3? Is y in the column space of A?

Elementary Linear Algebra (MindTap Course List)
8th Edition
ISBN:9781305658004
Author:Ron Larson
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Chapter4: Vector Spaces
Section4.6: Rank Of A Matrix And Systems Of Linear Equations
Problem 69E: Consider an mn matrix A and an np matrix B. Show that the row vectors of AB are in the row space of...
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If A = [a1, a2, a3] has as columns the three vectors a1, a2, and a3. What is y = Ax,
where x is a vector with three components, x1, x2, x3? Is y in the column space
of A? 

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