2022高三·全国·专题练习
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1 . 已知行列式
=6,则
=__ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1294ff156395184b57b6baee6e3a9b58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9167e52350fa18200d3288eee158893c.png)
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2 . 三阶行列式
中第
行第
列元素的代数余子式的值小于
,则实数
的取值范围为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86bbbd0dfc62ed9125fa80bb762ac1d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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3 . 已知矩阵
,矩阵
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26a46e7879436d532af3f4b6e258a81.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f12a8eaed52253ebbe17ebb0abcc883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cd557cf0cafbeaa8ffdc8a412227919.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26a46e7879436d532af3f4b6e258a81.png)
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4 . 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/e6bea6eaa806d4cfa739633bc4d9f827.png)
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5 . 用行列式讨论下列直线的位置关系![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d71187e41a7278c6f1893852944bb782.png)
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d4b99f920ce922c4709077a6662446.png)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d71187e41a7278c6f1893852944bb782.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d692c427b43ef979b55112687ccdf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d4b99f920ce922c4709077a6662446.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8b3be7c997a35b3277e1d3e0c9b0938.png)
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解题方法
6 . 设直线
与
的方程分别为
与
,则
是
的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c07fe25fccc48d9149b5d4ce4f8c6f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6d73a962dc813fa6d424dd4caa13704.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45079f12fc7ffce9813b387e32c6e42e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cdb9d8425d73a68731f30e0c0e22260.png)
A.充分非必要条件 | B.必要非充分条件 |
C.充要条件 | D.既非充分又非必要条件 |
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7 . 二元线性方程组
的系数行列式D为________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/245954bfbdd564ef9358c7db45533d36.png)
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解题方法
8 . 行列式
的值在
时恒小于0,则实数m的取值范围是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db397a80c369587ac097939c17b86091.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1591d4244dcf5539a4ae98f554e91e61.png)
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9 . 三阶行列式
的第
行第
列元素的代数余子式的值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f67432abf8e03dee7c82c021033bc458.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
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10 . 某人在超市一次性购买了
斤大米和
斤食用油,大米的价格是
元/斤,食用油的价格是
元/斤,则购买这两种商品的总花费可以用下列哪个算式计算得到( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b7f27ebcef70a3ebbbe8d2e53ea0896.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dba8a06047807bc14016594975df317e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b184c94e38f1e5dbe750b2168c2a37.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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