已知数列
满足
,
(
且
),若
恒成立,则M的最小值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14483a1c2f93ba110d85c4da7e41c00a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d31abdda89e6bd6a3d58b7a27df1e744.png)
A.2 | B.![]() | C.![]() | D.3 |
更新时间:2022-03-02 10:58:21
|
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解题方法
【推荐1】斐波那契数列又称“黄金分割数列”,在现代物理、准晶体结构、化学等领域都有着广泛的应用,斐波那契数列
可以用如下方法定义
,则
是数列
的第几项?( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6c40956fd3bf0022ccc3ab274b31c0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c45ea00c6b9f64a8523d65921f88802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
A.2022 | B.2023 | C.2024 | D.2025 |
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【推荐2】数列{an}满足a1,a2-a1,a3-a2,…,an-an-1是首项为1,公比为2的等比数列,那么an等于( )
A.2n-1 | B.2n-1-1 |
C.2n+1 | D.4n-1 |
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【推荐1】已知数列满足
,
,记数列
的前n项和为
,若对于任意
,不等式
恒成立,则实数k的取值范围为( )
A.![]() | B. ![]() | C. ![]() | D.![]() |
您最近一年使用:0次
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【推荐2】已知数列
,
满足
,若
的前
项和为
,且
对一切
恒成立,则实数
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43e7118494b0028a09f3e2bb572c350b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/610bf0995865773e408651b22c229033.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8259c75a04a3ecced6d9018534dea7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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