已知非负数x、y、z满足
,设
,求
的最大值与最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/846dd30369b813354c42668d8f7d3363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65cdf4080d50ae558a523b98eb9a5cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8542e50495795c98f7aa7501fe0690a.png)
更新时间:2016-12-06 00:36:40
|
【知识点】 不等式组和方程组结合的问题解读
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】已知方程
与不等式
,当
时,
,
同时成立,则称“
”是方程
与不等式
的“完美解”.
(1)已知①
,②
,③
,则方程
的解是不等式 (填序号)的“完美解”;
(2)若
是方程组
与不等式
的一组“完美解”,求a的取值范围;
(3)若
是方程
与不等式组
的“完美解”,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35557d92bc29cd0b5b8cb352a5cc02ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d314f8771046da1298311369ad35232d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a85c88abc666d70c1c0d958d728556dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b069592cd1591401a91d3933708cc400.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35557d92bc29cd0b5b8cb352a5cc02ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d314f8771046da1298311369ad35232d.png)
(1)已知①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba570646b7e1e6b7bca27b89c84ec0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46d8278095b122c23f18f895f7b5cc55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f05de8a00fb81ed6a76c5b6b5a8792.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dc910a1de3a2b876d303511ae6d1e13.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cad0086651e05c716cec1ba31cf09f1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eed9b69d9c382b99932da0bd3e898dd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f62e6d5df65308b7915deeee4fc92ad.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cad0086651e05c716cec1ba31cf09f1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0528b213a5f3d7b1b82b88f8a53a9447.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447ebc6724a21cab522e8f15ed97d456.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74cd1c6ab2a25c5063970a2850f00c47.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】已知关于x、y的方程组
的解都为非负数.
(1)求a的取值范围;
(2)已知
,求
的取值范围;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86b67e796c0b5d6ccbc9eca792d31ebc.png)
(1)求a的取值范围;
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6374a481d7780aaa51e9cb86aba9989b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d6fc9b90f370fbb27552876b650f8f.png)
您最近一年使用:0次