Prove that a linear system Ax = b is consistent if and only if the rank of (A | b) equals the rank of A.

Algebra and Trigonometry (MindTap Course List)
4th Edition
ISBN:9781305071742
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter10: Systems Of Equations And Inequalities
Section10.CR: Chapter Review
Problem 3CC: What is a system of linear equations in the variables x, y, and z?
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Prove that a linear system Ax = b is consistent if
and only if the rank of (A | b) equals the rank of A.

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