解题方法
1 . 已知函数
,则对任意的
,存在
、
(其中
、
且
),能使以下式子恒成立的是___________ .
①
;②
;③
;④
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/736957e967a0ec5b02ed7d63ff193c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dd0914dc4d4c7f75710ff460a286fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0877522738ef2132e041cb4584eced64.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dbebc3bd9907b6010a9944eb9cd326e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d7b7b170483af4698f8c6ee12520c32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d63fba45ed7493a7d980356c0932d0df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da9b35aaab30ef742d7c1017c1f760c5.png)
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2022-06-04更新
|
361次组卷
|
3卷引用:浙江省绍兴市诸暨市海亮高级中学2021-2022学年高三上学期12月选考数学试题
2 . 若实数
满足
,则xy=_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cfffc8194b24a459075659128d9cca2.png)
您最近一年使用:0次