在矩阵的初等变换或者行列式中的化简，两行可不可以先加减，再变换。还是只能像图上那样写，只能先写变换 一个线性代数问题，请问，含有参数的矩阵，怎样进行初等变换啊，...
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这看你化多之后习惯怎么做
不知道不知道
简单
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