1 . 解方程组
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faf93f3c0bf250ba5f8b641d1d8da142.png)
您最近一年使用:0次
2 . (1)试探求方程组
有唯一解的充要条件.
(2)由9个正数组成的矩阵
中,每行中的三个数成等差数列,且
、![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e65f7c16622ec34b1276eb265a6e9bb.png)
、
成等比数列,下列四个判断中,正确的有________ 个.
①第2列
、
、
必成等比数列;②第1列
、
、
不一定成等比数列;③
;④若9个数之和等于9,则
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64ea505f38e24ecc9191265fabea46aa.png)
(2)由9个正数组成的矩阵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d537d58c1657629b053368830666779.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeb9d1aa1cc02e6fe13141ecf5f2549b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e65f7c16622ec34b1276eb265a6e9bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ee1dc1b0ea35ee824e9e647f46987b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/699f39dd97b907f10708e0dc75076f8a.png)
①第2列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e76d1d8e50dda4d50229a8a20c57e58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33e11a5b70e1e2e685d1783a4707872e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/498d357985304a737e7a01272ebbcf15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e84c30444f13d37ada78285dc4f83b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc29ee719feeedfbc8c529cf11348abf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3a555e932cee7a505419ca454e4d1a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b829cb8d1278c92e5976b0ab4716bdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56952d18c393108434a65bc835cd7621.png)
您最近一年使用:0次
3 . 用矩阵变换的方法解方程组
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cc9ca3c1f6ca2d2f135a78c2ecab659.png)
您最近一年使用:0次
4 . 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)
您最近一年使用:0次
18-19高二上·上海闵行·阶段练习
名校
5 . 定义“矩阵”的一种运算
,该运算的意义为点
在矩阵
的变换下成点
,设矩阵![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7850a678282aefaba44425ce7fe74eec.png)
已知点
在矩阵
的变换后得到的点
的坐标为
,试求点
的坐标;
是否存在这样的直线:它上面的任一点经矩阵
变换后得到的点仍在该直线上?若存在,试求出所有这样的直线;若不存在,则说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d54a9d0a36ad911eff16f122c826882.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a79a33a83a7ba57a34b5093d1d1d02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1eaadd274b7644891f5550a799a11bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90b6f8e174918e1f29bcca8a236b1c6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7850a678282aefaba44425ce7fe74eec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e088ba0228e35b518cd46a14ae3dcc3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
您最近一年使用:0次
名校
6 . 方程组:
的增广矩阵是_______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81497fcd8f91d0653587828702e78188.png)
您最近一年使用:0次
2019-11-08更新
|
62次组卷
|
2卷引用:上海市新川中学2019-2020学年高二上学期第一次月考数学试题
名校
7 . 用行列式法解关于
、
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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34afd4eae1251db255e3474b9b57f0aa.png)
您最近一年使用:0次
2019-11-08更新
|
80次组卷
|
2卷引用:上海市闵行区闵行中学2019-2020学年度高二上学期期中数学试题
名校
8 . 把二元一次方程组的增广矩阵
变换为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edff1881635893293dd411ead8194aca.png)
________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b310766f85c79195e30cf8a7574c939b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44c03b9c9cb0af1c9b35553ddbbcb7fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edff1881635893293dd411ead8194aca.png)
您最近一年使用:0次
名校
9 . 用行列式讨论关于x,y的方程组
的解的情况.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25a456d70d1660104a3cf1e529aea524.png)
您最近一年使用:0次
10 . 若关于
的二元一次方程组
有无穷多解,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2e647c14561826ba9e396acc5a3792c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87f5a1bada02ff93f8bd65a2ac2dc759.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
您最近一年使用:0次