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1 . 若等差数列
满足
,则
的值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/700e6f3b40fc7bda75fc5a534d818cbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
您最近一年使用:0次
2022-06-22更新
|
673次组卷
|
2卷引用:2022年全国高中数学联赛江苏赛区苏州市选拔赛试题
2 . 已知正实数
,
,
满足
,则
的最小值为__________ .
![](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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fdba26ee6aaf3d0c6fc51f9fcc5935a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c4cf6bb45abf82b5c6d4b390c246571.png)
您最近一年使用:0次
3 . 设a>0,集合A={(x,y)|
},B={(x,y)|
}.若点P(x,y)∈A是点P(x,y)∈B的必要不充分条件,则a的取值范围是 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce07609151a2f6502d65be791cd7c6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/753159b83c80649b171765960fb0b4e4.png)
您最近一年使用:0次
2016-12-03更新
|
323次组卷
|
2卷引用:2015届江苏省广宇学校高三年级百强生竞赛文科数学试卷