选修4-5:不等式选讲已知
均为正数,证明:
,并确定
为何值时,等号成立.
![](https://img.xkw.com/dksih/QBM/2010/6/25/1569771375550464/1569771380850688/STEM/44e35709cb794af1a69ebc5f7b7077dc.png)
![](https://img.xkw.com/dksih/QBM/2010/6/25/1569771375550464/1569771380850688/STEM/f9703e89f1f14eeb89331e2f48879dca.png)
![](https://img.xkw.com/dksih/QBM/2010/6/25/1569771375550464/1569771380850688/STEM/44e35709cb794af1a69ebc5f7b7077dc.png)
2010·辽宁·高考真题 查看更多[3]
更新时间:2016-11-30 05:50:46
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【知识点】 三元基本(均值)不等式解读
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解答题-证明题
|
适中
(0.65)
解题方法
【推荐1】设
、
均为正数,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b21208364124b5c477b2ff8df1c2e8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89dcc7b8826e90b8307307268ab49646.png)
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解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐2】已知
.
(1)求
的最小值M;
(2)关于
的不等式
有解,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63cc99e8c7a8b7dbc126ee293c2ef552.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc2818de1c0d7d347718672b0bcec32.png)
(2)关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e896972777fcab95f9f210ffbb067c87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐3】如图,抛物线
与动圆
相交于
四个不同点.
![](https://img.xkw.com/dksih/QBM/2021/5/7/2715824813424640/2719301963030528/STEM/a639f744-9cd0-4017-8720-23d78e5fa650.png?resizew=261)
(1)求
的取值范围;
(2)求四边
面积
的最大值及相应
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c1ba86ffc6e5542b62319848c14acaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e33e067c00513b997c03a4b5ea100e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c82a10b4f0c9323d726804c89dd9548.png)
![](https://img.xkw.com/dksih/QBM/2021/5/7/2715824813424640/2719301963030528/STEM/a639f744-9cd0-4017-8720-23d78e5fa650.png?resizew=261)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
(2)求四边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
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