解题方法
1 . 已知函数
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/302cd6e850c45a8917edb18140d37f6e.png)
(1)当
时.解不等式
;
(2)记
表示实数
中的较大者.任意的
,是否有
恒成立?若是,请证明:否则,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb92bdb11a3d3f436891b4343b4d1c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/302cd6e850c45a8917edb18140d37f6e.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/558e11d700481dc414d5d073b4b88a3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cfe74dd3d0e67b768c83c41be7ab155.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03049a2f3be286f52c971144a37781c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eb6bf23a5a12e1ba5413594d7b1a57c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ee66828ed2d01defc1008d146d54728.png)
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解题方法
2 . 若函数
在
上有最大值,则实数
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02925fc3668bceb68f27ec18e8963362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d97ecc5418558dc393e22702488633d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-08-09更新
|
677次组卷
|
4卷引用:江西省南昌县莲塘第一中学2020-2021学年高二3月质量检测数学(理)试题
名校
3 . 设
对任意
恒成立,其中
、
是整数,则
的取值的集合为____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43c72cfbd2b796fbc0a1876887b2b6d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168163183a3d4663be45755f44676191.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d6fc9b90f370fbb27552876b650f8f.png)
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4 . 已知
中.
(1)当
时,解不等式
;
(2)已知
时,恒有
,求实数
的取值集合.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53a73897d9efd8d68967d80d87800733.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6acb0f1ac694dd177e99fc385f23318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次