1 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e83fa97fe23bceda2af56c71f39cf64d.png)
存在两个极值点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
,给出下列四个结论:
①函数
有零点;
②a的取值范围是
;
③
;
④
.
其中所有正确结论的序号是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e83fa97fe23bceda2af56c71f39cf64d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3442ce843d02b54055cfad056b091d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84b5f32c09caa0be0d4c33be07aa4530.png)
①函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
②a的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b02d210e1e781c1721ebafc0e2bc013.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311cff32b515f4fa954a3a5731cbb52c.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b202dcf62af3123644c61d130248b6d1.png)
其中所有正确结论的序号是
您最近一年使用:0次
2023-01-05更新
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777次组卷
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3卷引用:北京市海淀区中央民族大学附属中学2022-2023学年高二下学期期中考试数学试题
名校
2 . 设常数
,函数
,若函数
在
时有零点,则实数
的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cabbb7bc9b33f71760e36723ff39d62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5a0eba02eda23fedfa46a42b91ce26a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d58567d3cb3137e68b7ff1671cd8433.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2020高三·全国·专题练习
3 . 已知
在区间
上有极值点,实数a的取值范围是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/943b460634faef2d375de00432955794.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bbfd0c7caacb8f926dbc857f913a6dd.png)
您最近一年使用:0次