1 . 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 |
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2 . 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
3 . 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.![]() |
您最近一年使用:0次