名校
1 . 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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2 . 已知矩阵
,矩阵
.若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39b8316f9fe3d151242186bbd2510965.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c242127408111d884474ce671c102436.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c27c96d5d4bd9842ecc908919b535cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
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3 . 三阶行列式
中元素
的代数余子式的值等于___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/731412de319ac3fa6dba33bfd520e338.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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4 . 已知数列
满足条件
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7def23f30138e0b7c4c1e498d6903a6c.png)
(1)计算
,请猜测数列
的通项公式,并用数学归纳法证明;
(2)请分别构造一个二阶和三阶行列式,使它们的值均为
,其中,要求所构造的三阶行列式主对角线下方的元素均为零,并用按某行或者某列展开的方法验证三阶行列式的值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78ad02240a394e3a8374377d41a0b753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7def23f30138e0b7c4c1e498d6903a6c.png)
(1)计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/920ad6b9e7f1c2c4a5a3025ba57e71b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)请分别构造一个二阶和三阶行列式,使它们的值均为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
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5 . 在
行
列矩阵
中,若记位于第
行第
列的数为
,则当
时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9cb9ed76cdc491ccafa82644fd6e35a.png)
____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f91ffc90537600d1af85f12f33d1b1d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7600d2cfbdc6146db96cc545706004f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae4ba04f03a5ea1f60a340038c1bfec6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5b1672953164c806fee8e7d6d8336c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9cb9ed76cdc491ccafa82644fd6e35a.png)
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名校
6 . 已知关于x,y的一元二次方程组:
,当实数m为何值时,并在有解时求出方程组的解.
(1)方程组有唯一解?
(2)方程组无解?
(3)方程组有无穷多解?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2c2fc02b7c1253ce4976672e5cecbbf.png)
(1)方程组有唯一解?
(2)方程组无解?
(3)方程组有无穷多解?
您最近一年使用:0次
名校
7 . 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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名校
8 . 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
9 . 定义平面向量之间的一种运算“
”如下:对任意的
,
,
,有下列说法:① 若
与
垂直,则
;②
;③ 对任意的
,有
;④
;正确的是________ (写出所有正确的序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fd94e5c210921dfbe11796b1fc97cee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/898fd10efa9e4c8e9a3af5d21ae34397.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0eeb35c1b1071619314f02396bc1d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38e61bec06f9ca1ad8cfd906ec3a6e7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf57a52c99cc0cf6e802c6c1532a4352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaf258e34da2dc7e33b63cb82b01dbec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13e87088da41685cc8d433fbbe0e18d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb1f0d05fc69edbf6d23e925633e2ef3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02fd90727b21d64206bf44d937458ca8.png)
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名校
10 . 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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