名校
1 . 已知整数
满足
,定义![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac9a03333f95d750c9a9e559f7e6529.png)
,
.
(1)求证:
;
(2)若
为等比数列,公比为
,且
,求
;
(3)若
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/535577e9213fa6b2a2bed70460fc4077.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/593a666fcd36c98494398f26b1863a39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac9a03333f95d750c9a9e559f7e6529.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5adbce1478fc860834315adb24c144a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bcfc48f9bc23cc43085bdb910e7a136.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d83e1c68f3a7131da32f97430b201b64.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e8611719854a2448688e253b024be15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c575bc781c19f3e743b0d2573276435b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a40c26831b1ea4691c405ddffb3db1.png)
您最近一年使用:0次
名校
2 . 已知等比数列
的首项为2,公比为
,其前
项和记为
,若对任意的
,均有
恒成立,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f30d314a642667fef559032264647366.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1d489364bd65c69672b560f55bb2aae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06430886275f5ad62bcda62fce691e99.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-04-14更新
|
853次组卷
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