• 试题 ID 38085


$ D_n=\left|\begin{array}{cccc}x_1-m & x_2 & \cdots & x_n \\ x_1 & x_2-m & \cdots & x_n \\ \vdots & \vdots & \ddots & \vdots \\ x_1 & x_2 & \cdots & x_n-m\end{array}\right|$
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答案:

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解析:

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