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Unformatted text preview: atrix A, let R be
its row reduced echelon form. If Multivariable a row of zeros, A is not invertible. Otherwise, R is the
R has GFs
identity matrix. In Analyticlatter case, i E1 , . . . , Ek are the elementary matrices of the row operations
transforming A into FS: , EkB4 . . E2 E1 A = R,Analysis A = E1 E2 . . . Ek and A−1 = Ek 1 . . . E2 1 E1 1 .
R Part B: .IV, V, VI
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