用代入法解方程组
中,将①变形正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cd90771e342f766e5620ffdfe9fb602.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
更新时间:2020-09-28 10:07:18
|
相似题推荐
单选题
|
较易
(0.85)
【推荐2】下列结论正确的有( ).
①若
,则
②若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adf43051a852e223a120644395ea824a.png)
③若
,则
④若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf5821f59d12217af9a3804379c8231f.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ed31c8cbb733de3c6c97734dafd4226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f22fec5a381ae8aca93d876e54c79de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f22fec5a381ae8aca93d876e54c79de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adf43051a852e223a120644395ea824a.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a67542dcfbfe6cc6980c035f5342751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f22fec5a381ae8aca93d876e54c79de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f22fec5a381ae8aca93d876e54c79de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf5821f59d12217af9a3804379c8231f.png)
A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次
单选题
|
较易
(0.85)
【推荐1】解关于x、y的二元一次方程组
,将①代入②,消去y后所得到的方程是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00381f111a59f94de95ab0148ed3c25c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次