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1 . 已知方程组
的增广矩阵为
,若方程组有无穷组解,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31463b348f21711420670df9d7d03a8.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b6b3c1201f3b6b93c91ac551169d8b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/727c6955e99dd5269fdbe8e27bc14300.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31463b348f21711420670df9d7d03a8.png)
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2 . 写出下列线性方程组的系数矩阵和增广矩阵,用矩阵变换求解该方程组
,系数矩阵为______ ;增广矩阵为______ ;方程组的解为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7963d6655b4b6cdf092039462e77787e.png)
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