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For each of the following pairs of matrices \( A \) and \( B \), verify that
\[
\begin{array}{l}
(A B)^{\prime}=\left(B^{\prime} A^{\prime}\right) \text { : } \\
A=\left[\begin{array}{r}
-1 \\
2 \\
3
\end{array}\right] \text { and } B=\left[\begin{array}{lll}
-2 & -1 & -4
\end{array}\right]
\end{array}
\]
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