1. $A=\left[\begin{array}{cc}4& 3\\ 2& 1\end{array}\right]$

• A. $\left[\begin{array}{cc}\frac{1}{2}& -1\\ -\frac{3}{2}& -2\end{array}\right]$
• B. $\left[\begin{array}{cc}\frac{1}{2}& -1\\ -\frac{3}{2}& -2\end{array}\right]$
• C. $\left[\begin{array}{cc}\frac{1}{2}& -1\\ -\frac{3}{2}& -2\end{array}\right]$
• D. $\left[\begin{array}{cc}\frac{1}{2}& -1\\ -\frac{3}{2}& -2\end{array}\right]$

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