1 . 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)
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2 . 若线性方程组
的增广矩阵为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d783441589c242905239e83b6040a0fe.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a65bd6cdc598a67059dc4293a1694dc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23112019ff2644ada6da54fbb2a65d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d783441589c242905239e83b6040a0fe.png)
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3 . 已知线性方程组的增广矩阵为
若该线性方程组的解为
则实数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
___ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8002d291ce133b2c804674877123491.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9ed8e191353926e184d6f78f6bfc39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbc3c6f830496d03008ec7a759f61246.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e40012015d02b09a45ec74585e12b62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
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2019-11-06更新
|
85次组卷
|
3卷引用:上海市进才中学2017-2018学年高二上学期期中数学试题
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4 . 若等比数列
的公比为
,则关于
、
的二元一次方程组
的解的情况,下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](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/f2e4f220de5d09e8e1fb5b9ffcc40bf5.png)
A.对任意![]() ![]() |
B.对任意![]() ![]() |
C.当且仅当![]() |
D.当且仅当![]() |
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5 . 用行列式解关于x、y的方程组:
,并对解的情况进行讨论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a11426be2f51c54e336d499098ec1727.png)
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2020-01-07更新
|
185次组卷
|
7卷引用:上海市延安中学2018-2019学年高二上学期期中数学试题
6 . 方程组
的系数矩阵为_________ ;增广矩阵为_________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28ffdd55593b0e3727caa9d9f189b52f.png)
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7 . 用矩阵变换的方法,解二元一次方程组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b803ab7904bb35e1749b918bb6a8f7b6.png)
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8 . 已知关于
的一元二次方程组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ec9d65f2ecb3cd3e3c9dbefb3472a65.png)
(1)若方程组至少有一解,求
的取值范围;
(2)讨论方程组的解的情况并求解方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2e647c14561826ba9e396acc5a3792c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48d4f45fa516d26702bd57ff2209a9cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ec9d65f2ecb3cd3e3c9dbefb3472a65.png)
(1)若方程组至少有一解,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)讨论方程组的解的情况并求解方程.
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9 . 方程组
的增广矩阵是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bb66c070d7eb82d92c31e20dd9009f8.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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10 . 若线性方程组的增广矩阵为
,解为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892560dcff6af9f66a3f735652f69dd7.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bb19c57ae3e168c4826fca6a474b5dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4afdc6e467ef0e51a7fc45a3479c9e7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892560dcff6af9f66a3f735652f69dd7.png)
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