已知二次函数
.
(1)当
时,解不等式
;
(2)若不等式
的解集为
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ead6b3b721601d5967e40ed336d0324.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a71baf6217604517fd98fa97d0f55b43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
更新时间:2020-08-05 07:27:36
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】已知函数
(
).
(1)当
时,求不等式
的解集;
(2)解不等式
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72602d48b48e5b143414cf3a32395c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
(2)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
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解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐2】设集合
,
,
.
(1)求
.
(2)若
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b186b6503930dd68ecc414e0267def4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9e6c537d678ea04d6c146b79bc14c6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7b6afd010557c8c7667bf867af5d24e.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/709a1f33195ab62f2da488b27a219c25.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f744b0663ff1596e62a4fa115c8d98b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】(1)解方程
;
(2)对于函数
,若存在实数x0,使
成立,则称x0为
的固定点.
①当
时,求
的固定点;
②若对于任意实数b,函数
恒有两个不相同的固定点,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2be8c43081ed7c4e647fb233aff87600.png)
(2)对于函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afcd4a9364f0c7c5e7c2b7de0493a02d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66f66a2b3d90f0d935d6c8ebaf675349.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeb3e9800ad01d07578ee6cfa38620e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
②若对于任意实数b,函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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解答题-问答题
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适中
(0.65)
【推荐2】(1)当x>
时,求函数y=x
的最小值;
(2)设0<x<
,求函数y=
的最大值;
(3)已知
,
,
,若不等式
对已知的m,n及任意实数x恒成立,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f0f7cacce7b9817d2141557a635578c.png)
(2)设0<x<
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9344266dd4d7e3ce03a4a9be4f88b7ce.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8610232c77741a37463feba1a66c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ace87c090ea4c404012b833b12571f3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90b0f1b61d1b983aad01aa521c9ac3f.png)
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