1 . 已知矩阵
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26a46e7879436d532af3f4b6e258a81.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a375ca77464edc49e7e1473eeb6c1b6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f68b43ce6a3774527e6cf5a86d49168f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26a46e7879436d532af3f4b6e258a81.png)
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2 . ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/308581988844a2df0a39af695433c87d.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/308581988844a2df0a39af695433c87d.png)
您最近一年使用:0次
3 . 在
中,如果
,则
是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cd687e9949c022f153fb6e77484e2a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
A.直角三角形 | B.直角三角形或等腰三角形 | C.等腰三角形 | D.不能确定 |
您最近一年使用:0次
4 . 行列式
中,
的代数余子式的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c480cb11e4c4c5a4f915df4f8739423c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
5 . 在行列式
中,
,
,
是
,
,
的代数余子式,则下列选项不正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d14b38e1ab701f15d0f3e15e760f961a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e819b87f90651d89fcd258c276294e43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdc5c895153932c3e827a464664cef90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb35212fddffca72021a984cfb1eccea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50a272adba0f1120109824440f0e252c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1602c6064af12eed3fd1291f8272d93c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ed0b08b1e90740fa4b759ca90d08b32.png)
A. ![]() | B.![]() |
C.![]() | D.![]() |
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6 . ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9706296e76eee3e4fdfae120aa64d138.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9706296e76eee3e4fdfae120aa64d138.png)
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7 . 方程
的解为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4c0e396794b4c7ddab70c4a4610eea1.png)
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8 . 求证:(1)
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f793af5c1407c885b5de4cadee808fe.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b43095f6edf6b8fb4f5d51dba9fa285.png)
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9 . 解下列方程:
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22fce07437d47d7ad91bed5e86e4f543.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5944c06a97a25e712fac2ae942f00b06.png)
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10 . 不等式
的解集是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8bb7ef9f2d9773cb04ae7b90fbc96a4.png)
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