名校
解题方法
1 . 定义
表示不超过
的最大整数,
.例如:
,
.①
;②存在
使得
;③
是
成立的充分不必要条件;④方程
的所有实根之和为
,则上述命题为真命题的序号为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18f2754b3b1dad0794ec35a1771e1453.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/019a32cd5602875897f8b82f1eae7389.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc19b2e19b7568d3f9f1b7e72c54c556.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea454c3edb6077c86559d24de21ce059.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f07ad90ca228230b03f12eb48ee0c1d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0357d7585bf4e7b9946c680668bfff4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f44bd3e4cbda2dad3599946f95e7ee77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31524125240eedb1dc2698a498c46f60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/335be3671f56009f8c619ae5bb70b142.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
A.①② | B.①③ | C.②③ | D.①④ |
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2023-04-28更新
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1094次组卷
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4卷引用:新疆维吾尔自治区乌鲁木齐市2023届高三三模数学(理)试题
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