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矩阵里2行对换要变号吗？

2025-04-06 21:06:07

推荐回答（2个）

回答1：

矩阵行列式两行对换，其值不变号。
如果不是很明白，可以看看线性代数P30，例题里n个变量x1,x2……xn与m个变量y1,y2……ym之间的关系
前面的数字是变量的系数任何两行的交换都是对应到y变量的交换，最后的值是不会改变的

回答2：

矩阵不是一个具体的值 2行对换是一个等价变换

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