If \( A=\left[\begin{array}{rr}-1 & 2 \\ 3 & 1\end{array}\right] \), find \( f(A) \), where \( f...
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If \( A=\left[\begin{array}{rr}-1 & 2 \\ 3 & 1\end{array}\right] \), find \( f(A) \), where \( f(x)=x^{2}-2 x+3 \)
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