数列
的首项
,该数列是公比为
的等比数列.记
,
.
(1)证明:当
时,对一切
,都有
.
(2)当
时,是否存在自然数
,使得对任何自然数
,都有
?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5060ad37c403f248c937c1d59af5c71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e0308ef7b393c5d276e63fd231ceea3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b7d132982ea9592f4fc83060de2c362.png)
(1)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0dacc400d55a1a447d426d7a2312f3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac69e6db1df13ed64756b4f391ae9fac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/226e35e0bfce719466bc876d46be066c.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7326ea56be82bd616fec7e6aa3c884c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a34f80ee7d8e493e8a40e411ca6328e3.png)
2018高三·全国·竞赛 查看更多[1]
更新时间:2018-12-11 14:59:37
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