名校
1 . 利用行列式解关于
的二元一次方程组
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6215b48ddcae362f60d5d2623a05f46b.png)
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2020-03-04更新
|
152次组卷
|
3卷引用:上海市曹杨二中2017-2018学年高二上学期期中数学试题
2 . 已知线性方程组
.
写出方程组的系数矩阵和增广矩阵;
运用矩阵变换求解方程组.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df35a190a9bff0ac17d78a47fdd2aeb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
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2019-11-11更新
|
75次组卷
|
2卷引用:上海市浦东新区2018-2019学年高二上学期期中数学试题
名校
3 . 设常数
,利用行列式解关于x、y的二元一次方程组,并对其解的情况进行讨论:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2725a89d93c791f7a0098f4964587905.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba6ead1bac6f37e0b7913e0095aab0bf.png)
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4 . 用行列式的方法解关于
的二元一次方程组
,并对解的情况进行讨论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6215b48ddcae362f60d5d2623a05f46b.png)
您最近一年使用:0次
2019-11-08更新
|
55次组卷
|
2卷引用:上海市嘉定区封浜高级中学2018-2019学年高二上学期期中数学试题
名校
5 . 已知等比数列
的首项
,公比为
.
(1)求二价行列式
的值;
(2)试就
的不同取值情况,求解二元一次方程组
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1055b31cfe154ae3b9c4ed540bdb5973.png)
(1)求二价行列式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa5544e46205491f0b9b8394925242fb.png)
(2)试就
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a71672967131c3ce6e7640f1b368402.png)
您最近一年使用:0次
2020-02-01更新
|
139次组卷
|
2卷引用:上海市控江中学2017-2018学年高二上学期期中数学试题
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6 . 已知点
,
,
,
分别是基本单位向量.
(1)若点P是直线
的动点,且
,求点P的坐标
(2)若点
满足
且
,
,
是否存在自然数解,若存在,求出所有的自然数的解,若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50edfb9ed0d50d6f35ad6a130208d307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9d31cd03879d5c69ff11d0923f1ee82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc1480988d26abda64d9a4d20674ab76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89cdb00326a922074494892c166aeefe.png)
(1)若点P是直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b9f0b9e53a83e68f5fec944f343119.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fe4162b349b2f42d38580e1e13396b4.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee82283f06cedef32eb15b87964f5d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb6132011fb326fbc823742be48e14f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1087d3fd0e25fa56fa136290961b479.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1100379a4385b9ce064847bc21760adc.png)
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7 . 直线
:
,
:
试运用行列式的知识讨论当m取何值时,直线
与
.
(1)相交;
(2)平行;
(3)重合.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40726e1958a21c15a6865fce36535bc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d573582c36f51ff73265dc18bc9349d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
(1)相交;
(2)平行;
(3)重合.
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8 . 已知可逆矩阵
的逆矩阵为
,求
的特征值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9693f6d4e049b6f15b7dd2dcf38864c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2655762a4c8537c3fdec1aef47dc2343.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a84646168f0afc4380043a52b818c35.png)
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9 . 已知
阶方阵
中的各元素均为正数,其中每行成等差数列,每列都是公比为2的等比数列,已知
.
(1)求
和
的值;
(2)计算行列式
和
;
(3)设
,证明:当
是3的倍数时,
能被21整除.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/944e7a418f86eef567cf20c196db07dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/425dd6d107574d3aab56558cc08d2648.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe3785a7ea5220d7e990f08045f25222.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e84c30444f13d37ada78285dc4f83b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3bb6d9c3e9e00ccda6c5ccafefd630.png)
(2)计算行列式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e027dff5c04c837040f5c46422ad24e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358b8c349b8fe30ec98d66febfc76db8.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e82ff47d67bfb5ff6310538189ca49a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/963391e1a37b12d40d1bac0b1c9ac4ac.png)
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名校
10 . 设
分别是
的三边,行列式
.
(1)求字母
的代数余子式的展开式;
(2)若(1)的值为0,判断直线
与
的位置关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d1e3da77d79a473966026111f5d75c.png)
(1)求字母
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)若(1)的值为0,判断直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c05960d80943c9d9d6efefa6d00d3a47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e60cc87d56555331d3629eb04b2782c.png)
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