名校
解题方法
1 . 已知函数
,记
,
.
(1)若
,
,求集合
、
;
(2)若集合
,
,且
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369c33768fd972b3ebada251ca00a37b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d30bf91f31613ce80bba22a49862db03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6d1d63c6029951283ebd48a4e67e67b.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23725094c363fd158166a8698971694c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb5bac75f36bb1dc5c8190d4dbe681d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e373e8dbc56e341e997a918d16ea077b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6d5a1191a3db3ed0d9cfceefc6c5505.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe2d238c3d566f4412c4e5cef33a3366.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/980ab4deb9e7f2bc9288787f5243a4d2.png)
您最近一年使用:0次
2 . 若
为正实数,则
的最大值为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/964b30eda8b142b3ab11919b371d8a82.png)
您最近一年使用:0次