1 . 如果
有意义,则
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a22526ab73d400fc04e4f26ad1127c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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2 . ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a3f0f24cdeb42fcd13892ee9c588cf2.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a3f0f24cdeb42fcd13892ee9c588cf2.png)
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3 . ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbfd4f6dbe9904da8fce7b7ed269f66a.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbfd4f6dbe9904da8fce7b7ed269f66a.png)
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4 .
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c36a3eb2d02bc3bb93f28dbcf7215f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
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5 . 若行列式
中,
的代数余子式大于0,则
满足的条件是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51256f1fecb0bba2762cc2fc9ff3bcbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35aea718ef448f4dd96ff22dca1f9628.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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6 . 证明:(1)
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce78582134b36df467f87ae3b4c13faf.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c9f732b79f743b5a40bc769a0b40694.png)
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7 . 已知
,
,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e34f42b3be15518c29e3689c9fe6d6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10e468312d09c6563c9094b710a35a65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a553c24cd2c445cf565599857e9a46fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d990c409cc500b92649c0609219042d8.png)
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8 . 用行列式解下列方程组.
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37bb1dbc5c028a53051997dff85bfbec.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b423751ca1cbccc010b6f5b63e8d432.png)
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9 . 解方程:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc1b0f8fa2e5376d526711f565908bd7.png)
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10 . ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d873a1df3eec617839bdaf23f9635de.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d873a1df3eec617839bdaf23f9635de.png)
您最近一年使用:0次