If the matrix \( A=\left[\begin{array}{ccc}1 & 1 & 2 \\ 0 & 2 & -3 ...

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If the matrix \( A=\left[\begin{array}{ccc}1 & 1 & 2 \\ 0 & 2 & -3 \\ 3 & -2 & 4\end{array}\right] \) and
\( \mathrm{P} \)
W
\[
B^{-1}=\left[\begin{array}{ccc}
1 & 2 & 0 \\
0 & 3 & -1 \\
1 & 0 & 2
\end{array}\right] \text {, the }
\]
then compute \( (A B)^{-1} \).
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