Let A is a 4 x 4 matrix such that Ar=0 has non trivial solutions. Is the matrix A invertible? Explain your answer.

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter3: Matrices
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Let A is a 4 x 4 matrix such that Ar=0 has non trivial solutions. Is the matrix A invertible?
Explain your answer.
Transcribed Image Text:Let A is a 4 x 4 matrix such that Ar=0 has non trivial solutions. Is the matrix A invertible? Explain your answer.
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