选修4-5:不等式选讲
设函数
.
(1)当
时, 解不等式:
;
(2)若存在
,使得
,试求实数
的取值范围.
设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a47f9e7b22980842de50219f2f18c97e.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b188adb08c95d97c3b38733fe710c27d.png)
(2)若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fc71b0c5344d31009c869adfc62d0d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e94b372391c0b3fe22065b9685d74367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2016-11-21 17:12:49
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解答题-问答题
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适中
(0.65)
名校
【推荐1】已知
,
.
(1)当
时,求不等式
的解集;
(2)若
,且当
时,
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34b0f9a2dc7c18c6f04f97512320be07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae2544ed42ad77c8f98269717c623dda.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03fc1cd2baabbf8afea25478e1258237.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55feb3cbcaf37c63b6ce1c5abece8af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/768815509a62829482140633a1fe4218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab42740d8f095b5f7825d14c4c312096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐2】已知函数
.
(1)解不等式
;
(2)设
的最小值为
,实数
,
满足
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf1eadb9b6e5ecbda9912a1911ad5d9c.png)
(1)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2608b2ca65b915a130aa4d6499966a3.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.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/0af8841f2c836809ed1454924e4793e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5d6a7e1aff00b56313d73ddac0d64a.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
名校
【推荐1】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fecdd4c10555b14892c2a3673feab33.png)
(1)解不等式
;
(2)若关于
的不等式
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fecdd4c10555b14892c2a3673feab33.png)
(1)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aac626c05da00b3d40cf260cb95f4a0.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b67d8e749ed70301f60e303fbd97854.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐2】已知函数
.
(1)求不等式
的解集;
(2)若不等式
在
上恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91616b913d1c11d5fe792d013e5b1e8a.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b51035f9b1a84d36570e1eefa1386a6a.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7113bb3e748adbc1e44d3dba6bb5e91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ead3fdcb8fe8f5eb3dbe7d96cabc28b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次