1 . 不等式
的解是
,试求
,
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/232322f4c8bfabaf21689093dacadd08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a551a88ac426439803f564a3bbee04a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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2 . 解下列方程:
(1)
; (2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a9e592081b0304f89b8d79df1395fc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e8c8c6888db98c95bc6a1b0b167d48c.png)
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3 . 试将
写成一个三阶行列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/009b17cb757b3e55ef52b818bce9b359.png)
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4 . 已知行列式的值等于行列式的某一行(或一列)的元素与它对应的代数余子式的乘积的和.据此,请计算四阶行列式
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c6b33bce380a98ce440ff34bdc1b1da.png)
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5 . 解关于
,
,
的方程组
.
![](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/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37050ed51d892a71a969742226ff099.png)
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6 . 解关于
的不等式
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b42876aa4c70fa95c5f0b531492af247.png)
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7 . 讨论关于
,
,
的方程组
解的情况.
![](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/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80fbf5d945cf0aeb33f336746fec196b.png)
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8 . 已知
,且
、
、
是
的三边长,试判断
的形状,并证明之.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83dd6a814dd7e75d45f9b33d79644120.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/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
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9 . 用行列式解方程组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7a7eae718b1cb5cf357020e821e4573.png)
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10 . 解关于
的方程:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/752ce06f78e3830745ed468a361edae4.png)
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