题型:单选题
难度:0.65
引用次数:348
题号:11052621
已知方程组
中,
,
互为相反数,则
的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7819a2755154011bffb173812415fbc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2020-08-18 21:07:27
|
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单选题
|
适中
(0.65)
【推荐1】已知关于x,y的二元一次方程组
,下列结论中正确的是( )
①当这个方程组的解x,y的值互为相反数时,a=﹣1;
②当x为正数,y为非负数时,﹣
<a≤
;
③无论a取何值,x+2y的值始终不变.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0c606f28ba83a2e5ed9be30750c9c78.png)
①当这个方程组的解x,y的值互为相反数时,a=﹣1;
②当x为正数,y为非负数时,﹣
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
③无论a取何值,x+2y的值始终不变.
A.①② | B.②③ | C.①③ | D.①②③ |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐1】如果
是二元一次方程组
的解,那么a,b的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96a12809350442aef5a6a3476e35255d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e77405f97e60d60ce40c78fa3b7fa70.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐2】已知
,
是整数,且满足
,
,则整数
的所有可能值有( )个
![](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/04836ba2906cf6f1e9aecd2a00824aae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa104e5d74e96c9d2afbbe2d9b239621.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.4 | B.5 | C.6 | D.8 |
您最近一年使用:0次