1 . 直线l的方程为
,则直线l的一个法向量为 __ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0b33323bcb2e70aa2e01aa8f174d01d.png)
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2 . 若线性方程组的增广矩阵为
的解为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f9fe114651ec816d2648e5ca40995f7.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8506d2e0306b695aa43d8014e9ff5fe1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83e63ff2b4867ad1646ec7d2fdcaa9d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f9fe114651ec816d2648e5ca40995f7.png)
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3 . 若
,则实数
的值为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44d390de9e13c16c470c17d8166ec932.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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4 . 若增广矩阵为
的线性方程组无实数解,则实数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16017b81c660c59b4dc84cc829af8fef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
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5 . 若数列
满足
,且
存在,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2880eed03628af7f92883b3b1ec0f733.png)
___________ ;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/875aaf2ee2590f606b32d0f6cf579181.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccb3a970bf38d5616614fbc065edee88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2880eed03628af7f92883b3b1ec0f733.png)
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6 . 行列式
的值为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7d50e68aa24ffc97931da433d19f1.png)
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7 .
是方程组
有唯一解的( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf7caa6d67049316e59ae625ca6d5ff9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/375ff81c7fbae5f1e02da6250459ca43.png)
A.充分不必要条件 | B.必要不充分条件 |
C.充要条件 | D.既不充分也不必要条件. |
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8 . 三阶行列式
中元素
的代数余子式的值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/097f492c5d94aa6b3deea31e116acdd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d13ce3ebd1112220c639562739f1f9d1.png)
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9 . 已知一个关于x、y的二元一次方程组的增广矩阵是
,其解为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934d37c81b2266c7b86bcc11afaf5f91.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f8dbab483f39b65ece5680f7c039c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/203dfe536ac65ff8405862204fca6ea7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934d37c81b2266c7b86bcc11afaf5f91.png)
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10 . 若关于
的线性方程组的增广矩阵为
,该方程组的解为
,则
的值等于______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f640d4c6ea2591d85488d00d13da92d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb312945a38bba8f95bb992785c5651f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/815908b3b62f61a58ad2d99d3052435b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1019d4ad2e3fb4a7abb66e0e9e55b556.png)
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