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

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

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