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高斯消元, 利用位操作^

Posted by zab08 at 2009-09-26 20:39:15 on Problem 1830
1. 建立增广矩阵。
2.利用初等变化将增广矩阵转换为行阶梯阵。
3. 求解。

这道题求自由变量的个数。

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