已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3641c8d650f9529642423072d8c44d58.png)
1
已知关于x的不等式
有实数解,求实数a的取值范围;
2
解不等式
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3641c8d650f9529642423072d8c44d58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a5d7f7e302d2473abef1cfe13578109.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d517cc191a0c78ec1d97af58ee705b19.png)
更新时间:2019-04-10 12:49:44
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解答题-问答题
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适中
(0.65)
【推荐1】选修4-5:不等式选讲
已知实数
,函数
的最大值为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c9ab51e0bae2c3b0f6c556ea9cdf7ad.png)
(Ⅰ)求
的值;
(Ⅱ)设函数
,若
,求
的取值范围.
已知实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2684b72f9f38f5046c8ecd4280b7b14b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d019017ca3b66486994160f50439342.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c9ab51e0bae2c3b0f6c556ea9cdf7ad.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d6fc9b90f370fbb27552876b650f8f.png)
(Ⅱ)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/044bb4ab898d92fc42cc9ff47a0f9132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d29a19d59b637c811f2cfd9a4981152e.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
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适中
(0.65)
解题方法
【推荐2】已知函数
.
(1)当
时,解不等式
;
(2)若对任意的
,存在
,使得
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f2c26790ee5d275977a7ef2fe844251.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/711b21672fd907c5c92fee1d649e7003.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e5c1a7acdad9794447abfe58bd9f806.png)
(2)若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94f9d255ca420fa2486b11fcb7763b44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33890c6b0bf167514d44139d9dca0154.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44196db1c1f4366ff36bcbcfdecc05fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
解答题
|
适中
(0.65)
【推荐1】选修4-5:不等式选讲
已知函数
.
(1)当
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的解集;
(2)若
,求
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已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93c8e7532060117eec25a19220ce068a.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03fc1cd2baabbf8afea25478e1258237.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e4c8aa48e10cea4faeb7b1af34f09c.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
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适中
(0.65)
名校
解题方法
【推荐2】已知函数
,
.
(1)若
,求实数
的取值范围;
(2)解关于
的不等式
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc8744b7d0c503a2b618bebfd513536e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/248ef566e8102f0fc15bbf82e3fa01ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)解关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6acb0f1ac694dd177e99fc385f23318.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐3】已知函数
.
(1)求不等式
的解集;
(2)若
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,求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81742c108fe202b517c2d34a7b75560d.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f81ed7f6a4475e0fa682fa81ee747da3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4c420d561a7113eee1fa01f63f0849b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac42025e439a68768819900999631ed3.png)
您最近一年使用:0次