Let A E Cmxn and be Cm. Show that the following three statements are equivalent: . There exists a vector x E C" such that Ax = b, Rank(A) Rank ([A b) where [A b] = Cmx(n+1) is a matrix obtained by appending b after the last column of A, and AA¹b = b. ● =

Elementary Linear Algebra (MindTap Course List)
8th Edition
ISBN:9781305658004
Author:Ron Larson
Publisher:Ron Larson
Chapter4: Vector Spaces
Section4.6: Rank Of A Matrix And Systems Of Linear Equations
Problem 77E: Let A and B be square matrices of order n satisfying, Ax=Bx for all x in all Rn. a Find the rank and...
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Let A E Cmxn and be Cm. Show that the following three statements are equivalent:
• There exists a vector x E C" such that Ax = b,
Rank(A) Rank ([A b]) where [A b] = Cmx(n+1) is a matrix obtained by
appending b after the last column of A, and
AA¹b = b.
●
●
=
Transcribed Image Text:Let A E Cmxn and be Cm. Show that the following three statements are equivalent: • There exists a vector x E C" such that Ax = b, Rank(A) Rank ([A b]) where [A b] = Cmx(n+1) is a matrix obtained by appending b after the last column of A, and AA¹b = b. ● ● =
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