Let \( A=\left[\begin{array}{rr}5 & -1 \\ 6 & 7\end{array}\right] \) and \( B=\left[\begin{array...
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0Let \( A=\left[\begin{array}{rr}5 & -1 \\ 6 & 7\end{array}\right] \) and \( B=\left[\begin{array}{ll}2 & 1 \\ 3 & 4\end{array}\right] \), verify that
\[
(3 A)^{\prime}=3 A^{\prime}
\]
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