已知函数
.
(Ⅰ)当a = 3时,求不等式
的解集;
(Ⅱ)若
对
恒成立,求实数a的取值范围.
![](https://img.xkw.com/dksih/QBM/2013/9/23/1571360499834880/1571360505831424/STEM/72cb904daba74198b578ff9ca26a4d4d.png)
(Ⅰ)当a = 3时,求不等式
![](https://img.xkw.com/dksih/QBM/2013/9/23/1571360499834880/1571360505831424/STEM/00f74c6f43d045348decd216720ef2b7.png)
(Ⅱ)若
![](https://img.xkw.com/dksih/QBM/2013/9/23/1571360499834880/1571360505831424/STEM/1b60c7ce16ea4365b9f85d31bba1537a.png)
![](https://img.xkw.com/dksih/QBM/2013/9/23/1571360499834880/1571360505831424/STEM/4f5a77e24e114938975911298b7318e2.png)
12-13高三·宁夏银川·阶段练习 查看更多[1]
(已下线)2014届宁夏银川一中高三年级第一次月考理科数学试卷
更新时间:2016-12-02 12:03:33
|
【知识点】 绝对值不等式
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解题方法
【推荐1】已知函数
,函数
的最小值为k.
(1)求k的值;
(2)已知a,b,c均为正数,且
,求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c20ca5659980f4f2a09b31f6b512e9a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(1)求k的值;
(2)已知a,b,c均为正数,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13c7a574f50533836dc4bac87c86529a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dd4067a19eeb07474557fe7b2508880.png)
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解答题-问答题
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适中
(0.65)
名校
【推荐2】已知函数
.
(1)当
时,求不等式
的解集;
(2)若
时,
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05e91c17059211de042bba6a09126757.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/940adbf54e96ecb2bb2637e5f976a3b0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e84331f34fa1786046d1fc22b508cf74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次