1 . 在一个有穷数列的每相邻两项之间插入这两项的和,形成新的数列,我们把这样的操作叫做该数列的一次“H扩展”.已知数列1,2,第一次“H扩展”后得到1,3,2;第二次“H扩展”后得到1,4,3,5,2.则第六次“H扩展”后得到的数列的项数为___________ .
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2022-12-06更新
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610次组卷
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2卷引用:云南省昆明市第三中学2023届高三下学期数学高考适应性课堂测试题
2 . 数列
满足
,
,
,
.若
,则实数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f1e5d29de6e4d72bfed62d9c14dde5.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9b6e51986fe5d7a7265e0e93adcb4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced4e381e8c3336848b8c436dbc584f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f36d5c45d664ec834f5f493d74f8d698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7ffee3e5fc3ddd2749e8e0deb9a0c24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f1e5d29de6e4d72bfed62d9c14dde5.png)
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2019-04-08更新
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203次组卷
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4卷引用:【市级联考】云南省昆明市2019届高三复习教学质量检测文科数学试题
【市级联考】云南省昆明市2019届高三复习教学质量检测文科数学试题江西省九江市第七中学2021届高三上学期期中考试数学(理)试题江西省九江市第七中学2021届高三上学期期中考试数学(文)试题(已下线)专题3 数列的综合问题-学会解题之高三数学321训练体系【2022版】
3 . 已知数列
满足
,
,
,则该数列的前20项和为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/606e55241a2e145d54849129b8ffd20f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9b6e51986fe5d7a7265e0e93adcb4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beec62abc4297bc2e8c39c09adb402dd.png)
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4 . 已知数列
满足
,
,
,
,则![](https://img.xkw.com/dksih/QBM/2016/1/6/1572421892243456/1572421898059776/STEM/7dcc028ca7dd44c89f186496c61b59f8.png?resizew=47)
___ .
![](https://img.xkw.com/dksih/QBM/2016/1/6/1572421892243456/1572421898059776/STEM/d2bb51ebdbd04b1b990073036cfaf16b.png?resizew=63)
![](https://img.xkw.com/dksih/QBM/2016/1/6/1572421892243456/1572421898059776/STEM/84b8646d68134662ae3d4dc0ba675027.png?resizew=47)
![](https://img.xkw.com/dksih/QBM/2016/1/6/1572421892243456/1572421898059776/STEM/8224448480524c7aa11feef046147d3f.png?resizew=72)
![](https://img.xkw.com/dksih/QBM/2016/1/6/1572421892243456/1572421898059776/STEM/4c30bb94bd37459d893f50a082305fb8.png?resizew=85)
![](https://img.xkw.com/dksih/QBM/2016/1/6/1572421892243456/1572421898059776/STEM/1fa2e8d67e724eea9262eaa8bc6f0c28.png?resizew=48)
![](https://img.xkw.com/dksih/QBM/2016/1/6/1572421892243456/1572421898059776/STEM/7dcc028ca7dd44c89f186496c61b59f8.png?resizew=47)
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解题方法
5 . 已知函数f(x)的定义域为R,对任意的x,y都有
,且当x>0时,
,若数列
满足
,且
(
),则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6ebf5fca7fb593fee014e1fda7a2924.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c33ac9899f3944ebd15335ceb5572e98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4d0cd47609b9d1865dfff4979161cf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbee4ceccdf3396733d915ea9ab8dcbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15bfd809faccbb8ae2b1401df33782d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1505d56f0b35fe7f2de1fe1888036e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6ebf5fca7fb593fee014e1fda7a2924.png)
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