名校
解题方法
1 . 已知
,数列
的前
项和为
,且
;
(1)求证:数列
是等比数列,并求出通项公式;
(2)对于任意的
(其中
,
,
,
均为正整数),若
和
的所有的乘积
的和记为
,试求
的值;
(3)设
,
,若数列
的前
项和为
,是否存在这样的实数
,使得对于所有的
都有
成立?若存在,求出
的取值范围;若不存在,请说明理由;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e654568f7561197af8dac889750a86b.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)对于任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50e50fee3065db29df0a182e17b9142.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ef835c9ad2636a9662fb6c99e3abc78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68f01cfc245e926581bdb125e0fba733.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7600d2cfbdc6146db96cc545706004f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50a272adba0f1120109824440f0e252c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb853c35a7d17396aa032e33505002f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeee42a40351adbd5d9445133f0fddfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db1c0849b21a1801dd16c74bb491b02b.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6cd8e0e45cfcc1b7305d106e0006bc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f69d56ee486f8b7aa15fec31032654.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edd6a506c0a4d15847ac3fc88437908a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb583e4bd8b09dead61adfcc29740a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
解题方法
2 . 如图所示,
,
,…,
,…是曲线
(
)上的点,
,
,…,
,…是x轴正半轴上的点,且
,
,…,
,…均为等腰直角三角形(
为坐标原点).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/1ffc8f62-96ab-455a-9972-4df3009665de.png?resizew=238)
(1)求数列
的通项公式;
(2)设
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b225d772013d021cf1bfe7b9421fa5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b7e35faab6d74fa0c36599c39d1698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c051c2459ca7e2edd8ece9e565ec4b09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8af2d78b119739a1242e1ae274a9198a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc65d6eb9b63f96d80b54ec9893aee8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc2326cb86431ec57dededd7c9ed60a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba15787e7f3851a3f24936000212296e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b25286f6029da66ce5270aacd05184f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f097e3c2591eeae50ba0d92b984d625.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/add8209d60d4bb35d09a0338d3e5e165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6696f67db73ba4a3eca968af0323f27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7356ec98b600ece41f3a6b4bc26a7d59.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/1ffc8f62-96ab-455a-9972-4df3009665de.png?resizew=238)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a388dd60ad00d4874a9af61a1d09f054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
2021-09-25更新
|
555次组卷
|
2卷引用:江苏省南通、盐城 、淮安、 宿迁等地部分学校2021-2022学年高一上学期第一次大联考数学试题
3 . 在平面直角坐标系中,函数
在第一象限内的图像如图所示,试做如下操作,把
轴上的区间
等分成
个小区间,在每一个小区间上作一个小矩形,使矩形的右端点落在函数
的图像上.若用
,表示第
个矩形的面积,
表示这
个矩形的面积总和.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/9d236159-b191-4908-8623-a647c6a3c36c.png?resizew=144)
(Ⅰ)求
的表达式;
(Ⅱ)请用数学归纳法证明等式:
;
(Ⅲ)求
的值,并说明
的几何意义.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ff65953311c700ffe160fb0d8a1afc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e11f4ca0e7ace69f92130d0525bcdb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ff65953311c700ffe160fb0d8a1afc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5742a858aae33282f10a20f60a70498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/9d236159-b191-4908-8623-a647c6a3c36c.png?resizew=144)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f255d0395fba51ca2d44293cca42e0a.png)
(Ⅱ)请用数学归纳法证明等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73d890a201846c41fc9935565d0cce73.png)
(Ⅲ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58abe92020722722506c7b12c7879ac5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58abe92020722722506c7b12c7879ac5.png)
您最近一年使用:0次
2020-06-03更新
|
283次组卷
|
4卷引用:安徽省蚌埠市第三中学2020-2021学年高二下学期4月月考理科数学试题
解题方法
4 . 按照如下规则构造数表:第一行是:2;第二行是:
;即3,5,第三行是:
即4,6,6,8;
(即从第二行起将上一行的数的每一项各项加1写出,再各项加3写出)
2
3,5
4,6,6,8
5,7,7,9,7,9,9,11
……………………………………
若第
行所有的项的和为
.
(1)求
;
(2)试求
与
的递推关系,并据此求出数列
的通项公式;
(3)设
,求
和
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63aa52c750f39eb315da59ebae171576.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cb4d826021241482742685f8f68e811.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
2
3,5
4,6,6,8
5,7,7,9,7,9,9,11
……………………………………
若第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a56f8a9f14dab4bd061ac817a39141be.png)
(2)试求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090426eb29836bc30c006b3739c08057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1bb1af3ce1ba0b5cac2e2916da8e6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58abe92020722722506c7b12c7879ac5.png)
您最近一年使用:0次
2020-02-10更新
|
280次组卷
|
3卷引用:上海市高桥中学2022届高三上学期9月月考数学试题