已知
,求
的最小值___________ ,求
的最大值___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1501c02defea7e4b30bc91944dec8b6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ad69a2aaa2f0cf877448df23e85311a.png)
更新时间:2021-12-22 13:19:19
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【推荐1】已知x>0,y>0,且
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【推荐2】已知圆
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【推荐1】已知方程
有两个相等实数根,则下列说法正确的是________ .
①.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d75bf9db46e18426cb75c9b3b1d7bd0.png)
②.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e35ccf4c82ddf6d08956cdb616771553.png)
③. 若不等式
的解集为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b058f0a0ccb1440f02717234fda5664.png)
④. 若不等式
的解集为
,且
,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c12a2fa21ae377bb56a21908ba0ba8c.png)
①.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d75bf9db46e18426cb75c9b3b1d7bd0.png)
②.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e35ccf4c82ddf6d08956cdb616771553.png)
③. 若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc1eb8caff453abec4cfe2a844417bb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78fcc90d2892223de6d48cd9765ee0c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b058f0a0ccb1440f02717234fda5664.png)
④. 若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a60db8c98143159d25e910dd3d08dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78fcc90d2892223de6d48cd9765ee0c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6021973db7a17aa9b5c5104615e84d3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60b97bb18e5ca34d22b5e827316a122a.png)
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【推荐2】下列结论正确的序号是______ .
①当x≥2时,
的最小值为2
②当x>0时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b2933f9a3664e1ec1d8ff10ab159669.png)
③当0<x≤2时,
无最大值
④当x>0且x≠1时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cddd9b95b189dd208b53553312f73a9.png)
⑤当
时,
①当x≥2时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9d99d1d9273c5fb149610850ac06ab0.png)
②当x>0时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b2933f9a3664e1ec1d8ff10ab159669.png)
③当0<x≤2时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7572f29c425376884a8bb3d1754184ab.png)
④当x>0且x≠1时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cddd9b95b189dd208b53553312f73a9.png)
⑤当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94ee300df44ff5ce767242cf772a21f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd1a9db30b91d40c205f40ea6c3a2a68.png)
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