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    <title>矩阵-习题</title>
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    <description><![CDATA[题目大纲 求解下列矩阵方程中的矩阵 X $ 3(\begin{bmatrix}-2 &amp; 0\\ \\ 1 &amp; 3\end{bmatrix}- 2X) = 2\begin{bmatrix}-2 &amp; 0\\ \\ 1 &amp; 3\end{bmatrix} $ 计算下列矩阵的乘积： （a）$ \begin{bmatrix}-2 &amp; 0 &amp; 3 \\ \\ 4 &amp; 1 &amp; -1 \end{bmatrix} \begin{bmatrix} 2 &amp; -1 \\ \\ 0 &amp;]]></description>
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    <description><![CDATA[矩阵的定义 一个规模为 m × n 的矩阵（matrix）M，是由 m 行 n 列实数所构成的矩形阵列。行数和列数的乘积表示了矩阵的维度。 矩阵中的数字则称作元]]></description>
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