(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

The 3x3 matrix A is transformed into I by the following elementary row operations

R1+2R3 -> R1

R2+2R3 ->R2

2R2 ->R2

R1 <->R2

2R3 ->R3

Find det(A)

2. Relevant equations

I assumed to start off with the problem since I was going backwards from I to A. I would do the opposite of each row operation ie

2R3-R1 ->R1

2R3-R2 ->R2

(1/2)R2 ->R2

R1 <->R2

(1/2)R3 ->R3

3. The attempt at a solution

By finding the det(A) I got -1/4. I'm confused on if I messed up on the row operations. When I did this problem without using the backwards row operations I got -4 which was also wrong. I'd appreciate any help

Thanks

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# Homework Help: Linear Algebra Matrix with Elementary Row Operations

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