If A is a 3 x 3 matrix and a1 + 2a2 a3 0, then A must be singular, where a1, a2, a3 are column vectors of A.

College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter6: Matrices And Determinants
Section: Chapter Questions
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If A is a 3 x 3 matrix and a1 + 2a2
0. then A must be singular, where
az
a1, a2, a3 are column vectors of A.
Transcribed Image Text:If A is a 3 x 3 matrix and a1 + 2a2 0. then A must be singular, where az a1, a2, a3 are column vectors of A.
If E is an elementary matrix, then ET is an
elementary matrix of the same type as E.
Transcribed Image Text:If E is an elementary matrix, then ET is an elementary matrix of the same type as E.
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