1 . 如图,
满足
,
,以
的斜边为第2个直角三角形的直角边,且
,再以
的斜边为第3个直角三角形的直角边,且
,依此方法一直继续下去,记第
个直角三角形为
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c529ce14c3a8a3b6d0782ca75905ea5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52705567101a48893de582656ef41527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0d39a1966d3cafd8f2d62f1bfb3fd42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c529ce14c3a8a3b6d0782ca75905ea5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6d99268098ad2b3700696911ff611c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f01de36c753a40f500d2b8f16363096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a728b3369ec967dbf99c8b0949584a48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/695e24580ae9f2743f75c0e4123ad97a.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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名校
解题方法
2 . 已知等比数列
满足
.
(1)求
的通项公式;
(2)设
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc6db3b1142ed663ee64d28e301c903.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f028090918966558bb9a871b599a6389.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
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3 . 已知等比数列
中,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25801f3ec5440678039d313174a7b890.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12c219fdb33154242eb6f8fb3a6594b6.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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4 . 将全体定义在
上的函数的集合记为
.对
,
,定义
上的函数之间的加法和数乘运算:
,
.已知
为一个满足线性关系的映射,即
,
,这里
,
,且满足对任意整数
,有
,数列
,
,其中
.
(1)求
,
的递推公式;(不需要提供初值,递推公式可以由
,
组成)
(2)若
满足
,
,且
为单调递减的正项数列:
①求
,
的通项公式;
②记
,记
为
的前
项和,证明:
为定值,并求出该定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef22ca8d5b8b58c1a14e9194c0099a17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c36b234ba460321e811de1729eadd4b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61acd1c49d32de78f8d0235cace4fbf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef22ca8d5b8b58c1a14e9194c0099a17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c23dec4407154acd2e3967792065e8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17b57618618f181fd05a317e8a906d38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70bf06b3ad97e617c7d82f679f39840a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/343f4f403a374f2dd8ebd56bb88e636f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78bd5c0c2f166b56c80fbcdfd77771b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c36b234ba460321e811de1729eadd4b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61acd1c49d32de78f8d0235cace4fbf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41af54e90eb1fd7b7d1f7d0a4859cd26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1287a37869c13c5a4ff3108f857875f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d34003dee77263146f38ca02532c9325.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e167b43045b3297248e334c41c621b8f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/363a93f8bbf86c21a80d69067e4d6126.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4585d9a8d6feaeefea918bf608b04d6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
②记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c448250ad1c9ad194bf97055bf71c444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c59e7c7a84a4bdb959e95536d0404ceb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbca35fbd64eb3107793652831a719a7.png)
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5 . 在数列
中,已知
.
(1)证明:
是等比数列,并求
的通项公式;
(2)若
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b70aa62d5dd947ec4d99ad3ef597937d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30baf422f22c1ac5d0c7ef0aecc54d86.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dd14e9531536156919dc528fb8c13d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b70aa62d5dd947ec4d99ad3ef597937d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a11464b549e0730e1f59f1d3a255786.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9416274a561322a0e3b69af7a1869211.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b708c8dcb2d66eb2ce0b3718a9cd924a.png)
您最近一年使用:0次
7日内更新
|
438次组卷
|
2卷引用:河南省商丘市部分学校2023-2024学年高二下学期期末考试数学试卷
6 . 已知数列
的前
项和为
,且
.
(1)求实数
的值和数列
的通项公式;
(2)若
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.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/9943ab347857464880b2a945a25acf93.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/578c8d256f3f7980b310abc713a901ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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解题方法
7 . 已知
是等差数列
的前
项和,
,数列
是公比大于1的等比数列,且
,
.
(1)求数列
和
的通项公式;
(2)设
,求使
取得最大值时
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4414e88541187aa93beb4b5c2601862c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a539f4656a7ff726f3cd77321bd92744.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e46afd640072fd6a5e2c94bb72c698b.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fbf68dfbe8feafc4d6b9218b352ffee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c59e7c7a84a4bdb959e95536d0404ceb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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解题方法
8 . 在等比数列
中,已知
,
.
(1)求公比
及数列
的通项公式;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18d8e8f821111de8075e5c3dfb22a5d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61f8dd5470fffcf59cb4af9a9cedb96e.png)
(1)求公比
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/010e1452347ec9e23a6ba2827a464543.png)
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解题方法
9 . 已知
为数列
的前
项和,
.
(1)求数列
的通项公式;
(2)若
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a26aa4cbbc507eb4743d9c52a94f9e.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcd049465cb121165640ec0010b4db52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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名校
10 . 将保护区分为面积大小相近的多个区域,用简单随机抽样的方法抽取其中15个区域进行编号,统计抽取到的每个区域的某种水源指标
和区域内该植物分布的数量
,得到数组
.已知
,
.
(1)求样本
的样本相关系数;
(2)假设该植物的寿命为随机变量X(X可取任意正整数),研究人员统计大量数据后发现,对于任意的
,寿命为
的样本在寿命超过k的样本里的数量占比与寿命为1的样本在全体样本中的数量占比相同,均为0.1,这种现象被称为“几何分布的无记忆性”.用含k的式子表示
,并求
的值.
附:样本相关系数
;当k足够大时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97ea8f47d8d8d9e1832d52b1c7425450.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/419ca3f47ea799e8633ba68323bf8f87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef046c85a536174bec951a53d9f60b33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd2455eeaec96b5bda3c1c60b61f9405.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db20dec991abd6d09e1349a370a12938.png)
(1)求样本
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba4ae37ec6a4504135ad1ab8d4ea3b49.png)
(2)假设该植物的寿命为随机变量X(X可取任意正整数),研究人员统计大量数据后发现,对于任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cad52924df9291d5d191d18e09374ee1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b00f4eb7f1bd2ccefbabf0c1dfa8f69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b7d317f97433b36431cce0add22741d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7902c66f2f52245f33358672f8cd52c.png)
附:样本相关系数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6773755d2d493055c8869d8f0975edb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d48723131b516e95795e360967b0a176.png)
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