1 . 若
,试求
的最值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbb6bf2a39640299b4e3bd61b5f3e13f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe1b2817c2fd871797c9f9e5bf20cdc.png)
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2 . 解方程组
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faf93f3c0bf250ba5f8b641d1d8da142.png)
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3 . 用行列式解方程组
,并加以讨论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c821b2967c93cfb04ef478358b164515.png)
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4 . 用矩阵变换的方法解方程
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01421676edf0e9547a8c066f8ce88032.png)
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5 . 关于
的矩阵
,列向量
.
(1)已知
,
,
,计算
,并指出该算式表示的意义;
(2)把反比例函数
的图象绕坐标原点逆时针旋转
,求得到曲线的方程;
(3)已知数列
,
,猜想并计算
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e16fcd8304a0a925d12b19f829ffdef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/777b1de5c57f879215e1cca147a76820.png)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87a60302649eb940748da818199e55da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e4fd085ee10f340a008389c4a1a80d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7656966dffb3078f7298e3c5cb7a3d8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07f8bf4795ad38b3417ab4e5499df2bf.png)
(2)把反比例函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377a2333ff8c63cbdb20b882d6d5a7ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
(3)已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a78a26e3eeac053424c52ab90f6a3490.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaa694d7b39bd011907d735372ba6874.png)
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6 . 矩阵
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65b56181fd53e8bb9b94853b0d71ad40.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2af87867f1de9d1a56a8c39edffcef05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac62d6940800184a6426aacfcb10c297.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65b56181fd53e8bb9b94853b0d71ad40.png)
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7 . 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/e8d6a2f7c9d7e649f6c97c2ba85d54c3.png)
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8 . 甲、乙、丙三位同学语文、数学、外语三门课的平时、期中、期末成绩如下表所示,如果总评成绩按平时
、期中
、期末
计算,试用矩阵方法求出这三位同学每门课的总评成绩.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23466fd31d0666cb9f65dced41188359.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4ec5b9d2f5dbd6ec1cac34dbd8e547.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bc00118b6316f277160328cf6a27a5e.png)
语文 | 数学 | 外语 | |||||||
平时 | 期中 | 期末 | 平时 | 期中 | 期末 | 平时 | 期中 | 期末 | |
甲 | |||||||||
乙 | |||||||||
丙 |
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9 . ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c190a78c61dc912a59225e9daeaca28.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c190a78c61dc912a59225e9daeaca28.png)
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10 . 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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