1 . 已知数列
满足
,
,则
的最小值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08fc4cbf5d4c01aba36cfa0764de1278.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39a69c59b22bbb875d664b23ae641e68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77288bfa684c2a9ca00c75743232a0e3.png)
您最近一年使用:0次
2022-11-18更新
|
1994次组卷
|
9卷引用:黑龙江省大庆市肇州县第二中学2023届高三下学期开学考试数学试题
2 . 数列
满足
,对任意
的都有
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/221f6196ad93548fd4a2cf618cd601af.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45956a02545d06860f2807c21ab10778.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/221f6196ad93548fd4a2cf618cd601af.png)
您最近一年使用:0次
3 . 数列{an}满足
, 数列{bn}满足
,且b1+b2+…b9=90,则b4•b6=_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05db014d432c1c820856f4baa603aedc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e5fc0b571e6545e133d36af338733b6.png)
您最近一年使用:0次