1 . 选修4-5:不等式选讲
已知函数
的最小值为2.
(1)求实数
的值;
(2)若
,求不等式
的解集.
已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa21ed5b585546d40f3416e7e3dfd510.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74dbd58b21a94cf93f4623c07452b102.png)
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2017-06-05更新
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547次组卷
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3卷引用:福建省泉州市2017届高三高考考前适应性模拟卷(二) 数学(文)试题
2 . 选修4—5:不等式选讲
已知
,且
.
(Ⅰ)试利用基本不等式求
的最小值
;
(Ⅱ)若实数
满足
,求证:
.
已知
![](https://img.xkw.com/dksih/QBM/2015/1/16/1571965939204096/1571965945356288/STEM/a6c426a192e44d81ae4cdd37b6363a3a.png)
![](https://img.xkw.com/dksih/QBM/2015/1/16/1571965939204096/1571965945356288/STEM/1bcd3a14be964024b61a7f58c3b55042.png)
(Ⅰ)试利用基本不等式求
![](https://img.xkw.com/dksih/QBM/2015/1/16/1571965939204096/1571965945356288/STEM/a1edb778a92f49fe9b83512d7adfc829.png)
![](https://img.xkw.com/dksih/QBM/2015/1/16/1571965939204096/1571965945356288/STEM/ebb3ee0aa5384a1185627bedeacd5537.png)
(Ⅱ)若实数
![](https://img.xkw.com/dksih/QBM/2015/1/16/1571965939204096/1571965945356288/STEM/9cdd607c4cf24c93a680ef8dace75c17.png)
![](https://img.xkw.com/dksih/QBM/2015/1/16/1571965939204096/1571965945356288/STEM/a19fde5c161a4d24974afb4945179557.png)
![](https://img.xkw.com/dksih/QBM/2015/1/16/1571965939204096/1571965945356288/STEM/ab47065bcfc6497c92b144bd282d77a3.png)
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