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The identity matrix \( I = \begin{bmatrix} 1 & 0 \\ 0 & 1 \end{bmatrix} \) acts like the number 1: \( AI = IA = A \).
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The identity matrix \( I = \begin{bmatrix} 1 & 0 \\ 0 & 1 \end{bmatrix} \) acts like the number 1: \( AI = IA = A \).
11 more points to remember - sign in to see the rest.