Transformations
Concept 2 of 11 in Matrices
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The row operation R2→R2−2R1R_2 \to R_2 - 2R_1R2→R2−2R1 turns [1021]\begin{bmatrix} 1 & 0 \\ 2 & 1 \end{bmatrix}[1201] into III. Can you use that to write down its inverse, with no formula?
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