1 . 若
,
,则使得
恒成立的
有( )个.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d229cbec798c9c278a9b5979cb38247.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/347bb0738680cbc037c17d6ee58177a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc4bd94cf781764a27dcad9d1d143c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
A.1 | B.2 | C.3 | D.2021 |
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2020-04-11更新
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285次组卷
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3卷引用:甘肃省张掖市山丹县第一中学2019-2020学年高二下学期期中考试数学(文)试题