Let A be a 3x3 invertible matrix. The reduced row-echelon form of A is obtained by performing the following three elementary row operations in order: (i) First multiply row I by-2. (ii) Then add 4 times row 3 to row 1. (iii) Then finally interchange rows 3 and 1. Then what is det(A)? det(A) = 0 27

Advanced Engineering Mathematics
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Chapter2: Second-order Linear Odes
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Let A be a 3x3 invertible matrix. The reduced row-echelon form of A is obtained by performing the following three elementary row operations in order:
(i) First multiply row I by -2.
(ii) Then add 4 times row 3 to row 1.
(iii) Then finally interchange rows 3 and 1.
Then what is det(A)?
det(A) = 0
27
Transcribed Image Text:Let A be a 3x3 invertible matrix. The reduced row-echelon form of A is obtained by performing the following three elementary row operations in order: (i) First multiply row I by -2. (ii) Then add 4 times row 3 to row 1. (iii) Then finally interchange rows 3 and 1. Then what is det(A)? det(A) = 0 27
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