名校
1 .
一元二次方程
有实数根,
,
是
的( )条件.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13fa32c1e926f40a0722d106563777ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e66f17496659651ff52461909693776.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
A.充分不必要 | B.必要不充分 | C.充分必要 | D.既不充分也不必要 |
您最近一年使用:0次
2022-11-05更新
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109次组卷
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3卷引用:天津市第五十七中学2023-2024学年高一上学期第一次月考数学试题