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Let A be a 33 matrix with det(A)=2. Suppose that B is obtained from A by performing the following sequence of elementary row operations R1R3,

Let A be a 33 matrix with det(A)=2. Suppose that B is obtained from A by performing the following sequence of elementary row operations R1R3, R213R2, R3R3+2R1. What is det(B)?

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