1 . 设
,计算:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05dcd0b803c5b77cd73add9eb136ad5c.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af26da329d5a2f07875856b3529952e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05dcd0b803c5b77cd73add9eb136ad5c.png)
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2 . 方程组
,它的系数行列式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a6d85799453899836bc34ad276ec80e.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eec97b69fe05e18829949f545e6b3a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a6d85799453899836bc34ad276ec80e.png)
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3 . 利用行列式解方程组:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0b835e7bab2181497a46a3f38fb4672.png)
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4 . 求关于
的方程组
,有唯一解的条件,并求在此条件下该方程组的解.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a14c388e1e2e5a2ff1ccf6caffbee0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2444f2183746892574776148af2d427b.png)
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5 . 利用行列式解下列方程组:
(1)
(2)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffb3514b340beb8f80f777434fe44dc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df433e7619c87cc589af5466630fd360.png)
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名校
6 . 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/d865edf717e5d45f5fe28260f91b3295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
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2020-06-26更新
|
95次组卷
|
2卷引用:沪教版(上海) 高二第一学期 新高考辅导与训练 第9章 矩阵和行列式初步 9.4(2)三阶行列式
7 . 求关于
的方程组:
有唯一解的条件,并求在此条件下该方程组的解.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a14c388e1e2e5a2ff1ccf6caffbee0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e43d36ad6b3726431ebcfbebad17a2.png)
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8 . 甲、乙、丙三人一起做一批零件,甲、乙两人合作,甲做8天乙做5天能够完成;甲、丙两人合作,甲做6天丙做9天能够完成;乙、丙两人合作,乙做10天丙做6天能够完成,那么甲、乙、丙单独做,各需多少天能够完成?
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9 . 已知矩阵
,
,若
,则矩阵![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b8b8f0c729dba1697e8b53fcf5669b1.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42dec82d1d9a3187a6c714c8c415ea73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36ccd4ffd522695254b539355f405464.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d31bd20786cec41dbee6318605736e83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b8b8f0c729dba1697e8b53fcf5669b1.png)
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10 . 已知
,
,
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e54ba55e0f32ac23a96ff8bb68fa2531.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e67a41a316910a796d40ffe4a732f5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65076538cf1172adf675653d319ad482.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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