已知数列
满足
,则
的最小值为__________ .
的前20项和为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a53cff6023f0f403b85f96fb7cf50f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77288bfa684c2a9ca00c75743232a0e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4151f3c3dc2e41be53ce3b155a075b1a.png)
更新时间:2022-01-17 16:02:10
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解题方法
【推荐1】在数列
中,
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______ ,
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89cad0277bcfe95cab3566f006f27e18.png)
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填空题-双空题
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适中
(0.65)
解题方法
【推荐2】已知数列
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,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
___________ ,
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62cd25deef9f3eb924d9cfe623de11e8.png)
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填空题-双空题
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解题方法
【推荐1】数列
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_________ ,若
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_________ .
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
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【推荐2】设数列
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d910649dcb5c2c9ce69e9fbbaf8c9bb.png)
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【推荐1】在数列{an}中,
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【推荐3】毕达哥拉斯学派是古希腊哲学家毕达哥拉斯及其信徒组成的学派,他们把美学视为自然科学的一个组成部分.美表现在数量比例上的对称与和谐,和谐起于差异的对立,美的本质在于和谐.他们常把数描绘成沙堆上的沙粒或小石子,并由它们排列而成的形状对自然数进行研究.如图所示,图形的点数分别为1,5,12,22,…,总结规律并以此类推下去,第10个图形对应的点数为___________ ,若这些数构成一个数列
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