方程组
有唯一解,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab3fb9d211a836d91d5db5c9d4be8b6.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1c0df903fa1be5d3d3aab55783c3c89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab3fb9d211a836d91d5db5c9d4be8b6.png)
更新时间:2019-11-10 16:13:22
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【知识点】 用矩阵判断二元一次方程组解的情况
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【推荐1】关于
、
的二元一次方程组
,
无解,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b657cfa91b6394e4b00fa385a2c0149.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cbb11b8e59d7f83f2f085de27bf41a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cc8ef902dc3481ae24d888f57466154.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b657cfa91b6394e4b00fa385a2c0149.png)
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【推荐2】由矩阵
表示x、y的二元一次方程组无解,则实数a=___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cff9abf09c92dc67e021550149428b7.png)
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