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$
\text { 设 } \boldsymbol{A}=\left(\begin{array}{rrr}
-1 & 0 & 0 \\
1 & -1 & 0 \\
0 & 1 & -1
\end{array}\right) \text {, 求 }(\boldsymbol{A}+2 \boldsymbol{E})^{-1}(\boldsymbol{A}-2 \boldsymbol{E})
$
                        
不再提醒