11-12高二上·江西·期末
1 . 给出下列命题:
①若“
或
”是假命题,则“
且
”是真命题;
②若实系数关于
的二次不等式,
的解集为
,则必有
且
;
③
;
④
.
其中真命题的是 .(填写序号)
①若“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a037d29525d118dc083dc3e5e808ca2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02475842a0c8318db41c5c38c3af7e66.png)
②若实系数关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/288e1c816d14cb1435c9eba18879be16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64060803ee2af6d9052c9bfabc506d6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eda48853e8bdb7e266370b4e0d5a258.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95f9c974c0b227f31390b444c701f7b4.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3afcff36051abf50ee72f03dd7de3a1.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4ee641ccc9d21176a96c20a7ed941ff.png)
其中真命题的是 .(填写序号)
您最近一年使用:0次
2016-12-03更新
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247次组卷
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3卷引用:2011年江西省莲塘一中高二上学期期末终结性数学文卷