真题
1 . 已知函数
=
.
(Ⅰ)当
时,求不等式
≥3的解集;
(Ⅱ) 若
≤
的解集包含
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b3089086afa6759e1ef8f26e40af5a3.png)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb8e1dd8da540badcb9a8f427c5b202e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(Ⅱ) 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33931651893cffc7112c99e608333059.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9210e75c35fb455d0446eb7ddba7d79c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
真题
2 . 选修4-5:不等式选讲
已知函数
(I)证明:
;
(II)求不等式
的解集.
已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f7dd8c4417adbf5dd51ef9263b46b0f.png)
(I)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db7a0f01a7ab567cb318e9ecd4268fe2.png)
(II)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/391d78592bbbc5425a237d6313791bb9.png)
您最近一年使用:0次