1 . 已知x,y,z满足
,则
的最小值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a8816ecb8ca9b9460e7441e54cc300d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b234b9abbda544279144d470215322de.png)
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2 . 给定
,
,设
、
、
、
且
,则对每个固定的
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8517a29f7e9285c4d50d5ec643488b5.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f02d5c8eec434a3f90348d770a2e2b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffdae5d1361b8fd5a18d102b2388671.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7845c8c6f2a0502721bdb48f4bc09088.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15ebd645d0255370e449ca17f643201c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8517a29f7e9285c4d50d5ec643488b5.png)
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3 . 在直角坐标平面上,若一个过原点且半径为r的圆完全落在区域
内,则r的最大值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/593e8604cf62293dab71402b3ab94b3e.png)
您最近一年使用:0次
2018-12-30更新
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331次组卷
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2卷引用:陕西省咸阳市武功县普集高中2022届高三重点班下学期3月月考理科数学试题
4 . 已知a、b、c、
,且
.则
的最大值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a876ecb804eb0553c246e5fcc40b708.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/117b60b6c923cf9ebe26224534fb5b2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a599a60e44effa88dee3aa6a307f78c.png)
您最近一年使用:0次