1 . 将4个数
,
,
,
排成2行2列,两边各加一条竖线记成
,定义
,上述记号就叫做2阶行列式若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b29320f184b4027471a2951527457453.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9fec025453bac0d34d5e9bdf61a6755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe09df62e1b245d7c7f5193707a826ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
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2 . 方程组
有无穷多解,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8bd1807f72e084049651e859c489ea5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
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3 . 方程组
有唯一解,则
应满足的条件是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a34fd485da9b47e75ccf746a847d1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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4 . 计算![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cab4fd6c4a37b79c70dfeddf28513021.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cab4fd6c4a37b79c70dfeddf28513021.png)
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5 .
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9dc4db11eb3657cb5b1ea86638b5070.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9dc4db11eb3657cb5b1ea86638b5070.png)
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6 . 函数
的值域是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ba4d8208417060140cacb12cf05c41b.png)
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7 . 不等式
的解集是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2784567aa52f13af9c230547450fe46c.png)
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8 . 方程
的解集是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6645d97b3a52a6f837719fdecb5f64cc.png)
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9 . 方程组
的增广矩阵通过矩阵变换可以化成
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2857d342c24be7bf135b2ac28af549d.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ef1a92b21d71838ca0b07aa2330dd54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62a9799afde65d54fe034a7e9ee4974b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2857d342c24be7bf135b2ac28af549d.png)
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