Prove that the row vectors of an nxn invertible matrix A form a basis for R".

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter3: Matrices
Section3.6: Introduction To Linear Transformations
Problem 55EQ
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2. Prove that the row vectors of an nx n invertible matrix A form a basis for R".
Hin: Again, there are several ways to do this. One way is to observe that if A is invertible, then
the reduced row echelon form of A is . Hence RS(A) = RS(I,) = R". Hence the row vectors
of A span R". It follows that the row vectors of A form a basis for R". Justify this argument by
citing the appropriate theorems in the textbook for the course or devise an argument of your
own.
Transcribed Image Text:2. Prove that the row vectors of an nx n invertible matrix A form a basis for R". Hin: Again, there are several ways to do this. One way is to observe that if A is invertible, then the reduced row echelon form of A is . Hence RS(A) = RS(I,) = R". Hence the row vectors of A span R". It follows that the row vectors of A form a basis for R". Justify this argument by citing the appropriate theorems in the textbook for the course or devise an argument of your own.
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