1 . 将正整数
分解为两个正整数
、
的积,即
,当
、
两数差的绝对值最小时,我们称其为最优分解.如
,其中
即为20的最优分解,当
、
是
的最优分解时,定义
,则数列
的前2024项的和为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0baf9e95e555b69df69a2bbc2ed86244.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0337976ed56157fdfdb4ad0d5083f87a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/355bc0d6058a3dd1254ff395176ec55b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a46ca6d6012da9e32aacb4103129f4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17236c6316d598e9804f5eab3cbef9f7.png)
您最近一年使用:0次
22-23高三下·上海浦东新·阶段练习
2 . 已知无穷实数列
的前n项和为
.若数列
既有最大项,也有最小项,则在:①“
且数列
严格递减”和②“
且数列
严格递增”中,
可能满足的条件是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/846fa57d92d6ad44d6a0cafad1e71ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/390636a89883bd64bf8da9bf8654aff9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b91adba8efbf964e9e35547b0fd0ea36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/179513ce80436471efbe1d9b31735f7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b91adba8efbf964e9e35547b0fd0ea36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
A.不存在 | B.只有① |
C.只有② | D.①和② |
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3 . 高斯是德国著名的数学家,近代数学奠基者之一,享有“数学王子”的称号,以他的名字定义的函数称为高斯函数
,其中
表示不超过x的最大整数.已知数列
满足
,
,
,若
,
为数列
的前n项和.
(1)证明:数列
是等比数列,并求数列
的通项公式;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aacac2cf1dd70cc65b1ca535a32c316.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2ab85825d4a002600ca41bd3cd2ee7d.png)
![](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/7def23f30138e0b7c4c1e498d6903a6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e46bca035f977f168c82ad4fce6845bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce49ab12f75d0829be561a7b3ed42a4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3462d4e0565158697bc5a14107f7407c.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d82c65a855b1eed9c43e6829f6c3bffb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c444c4d2fd7d65c5c1434e44814895b9.png)
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2023-03-16更新
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1019次组卷
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4卷引用:上海市宝山区2023届高三下学期3月月考数学试题
上海市宝山区2023届高三下学期3月月考数学试题上海市延安中学2024届高三下学期3月月考数学试题(已下线)重难点02数列求和的五种解题方法-【满分全攻略】2022-2023学年高二数学下学期核心考点+重难点讲练与测试(沪教版2020选修一+选修二)(已下线)第六篇 数论 专题2 数论函数 微点3 数论函数综合训练
名校
解题方法
4 . 已知数列
的各项均不为零,
,它的前n项和为
.且
,
,
(
)成等比数列,记
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7fab51121848ce166035ceab6f4e00b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b0cfe24f4698eaed9c426b24b4c9f69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090426eb29836bc30c006b3739c08057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff9c02dbb997821402b1be65ca34c3ee.png)
A.当![]() ![]() | B.当![]() ![]() |
C.当![]() ![]() | D.当![]() ![]() |
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2021-11-11更新
|
1526次组卷
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6卷引用:上海市南洋模范中学2021-2022学年高二上学期12月月考数学试题
上海市南洋模范中学2021-2022学年高二上学期12月月考数学试题浙江省金华十校2021-2022学年高三上学期11月月考数学试题(已下线)第4章 数列 单元综合检测(难点)-2023-2024学年高二数学同步精品课堂(沪教版2020选择性必修第一册)(已下线)2021年新高考浙江数学高考真题变式题6-10题(已下线)考点25 数列求和及其运用-备战2022年高考数学典型试题解读与变式(已下线)收官卷--备战2022年高考数学一轮复习收官卷(浙江专用)
名校
解题方法
5 . 若数列
的前
项和为
,且满足等式
.
(1)求数列
的通项公式;
(2)能否在数列
中找到这样的三项,它们按原来的顺序构成等差数列?说明理由;
(3)令
,记函数
的图像在
轴上截得的线段长为
,设
,求
,并证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.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/345307b291e338fbbd2bc86a39f53164.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(2)能否在数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(3)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/771991b0812e4ee2d678982c5461b86d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44c9752056ebb05a8e4eee608c34046b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c59e7c7a84a4bdb959e95536d0404ceb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a82433897679bbf03dab49684cbfec2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f5bb9e8d8cd3f0a8c7f1c3f239bd351.png)
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|
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10卷引用:上海市大同中学2021-2022学年高二上学期10月月考数学试题
上海市大同中学2021-2022学年高二上学期10月月考数学试题新疆维吾尔自治区喀什第六中学2023届高三上学期9月实用性月考(一)数学(文)试题新疆维吾尔自治区喀什第六中学2023届高三上学期9月实用性月考(一)数学(理)试题上海市松江一中2021-2022学年高二上学期期末数学试题(已下线)上海高二下学期期末真题精选(压轴60题35个考点专练)-【满分全攻略】2022-2023学年高二数学下学期核心考点+重难点讲练与测试(沪教版2020选修一+选修二)上海市嘉定区第一中学2023-2024学年高二上学期期中数学试题(已下线)期末真题必刷压轴60题(22个考点专练)-【满分全攻略】2023-2024学年高二数学同步讲义全优学案(沪教版2020必修第三册)(已下线)广东省2022届高三一模数学试题变式题17-22(已下线)专题11 数列前n项和的求法 微点5 裂项相消法求和(三)(已下线)专题15 数列不等式的证明 微点3 通项放缩法证明数列不等式
6 . 将杨辉三角中的每一个数
都换成分数
,就得到一个如图所示的分数三角形,称为莱布尼茨三角形,从莱布尼茨三角形可以看出:
,令
,
是
的前
项和,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b5e02141b837c7cd9cfe206fba42939.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/222aef14057e3507212528a359178739.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ca4f8307b64cf07055fe139009f34eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9262a6407b210aef21f543aae85c804e.png)
![](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/04c2864e2ec3416cc4c081ac1f71a0af.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/7/cbd835b2-263b-4067-9dc8-ca543ad4c7e9.png?resizew=463)
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2021-10-26更新
|
2533次组卷
|
7卷引用:上海市大同中学2021届高三上学期10月月考数学试题
上海市大同中学2021届高三上学期10月月考数学试题河北省衡水中学2023届高三六调数学试题湖北省武汉市武钢三中2022-2023学年高二下学期3月月考数学试题广东省仲元中学2022-2023学年高二下学期五月月考数学试题(已下线)数学与数学家(已下线)专题29 数列结合其他问题考查更精彩-备战2022年高考数学一轮复习一网打尽之重点难点突破(已下线)专题8 莱布尼茨
名校
解题方法
7 . 已知
,点
在函数
的图像上
,
,则数列
的前
项和![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a44042d110ad8bf676c2785c2b1f9a04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5397ee1eb6d157f6ec1e7a878f8d16e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9fc82353331abee0828dee9b38c08f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad75f8318b09f86fdd2af419e86ee291.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/04c2864e2ec3416cc4c081ac1f71a0af.png)
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名校
解题方法
8 . 数列
满足
,其前
项和为
,若
成立,则
的最大值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c88a7ef007c78a93e33bd77c4396626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7e8e37b47c46df284f6153cf942ff9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb6a7a09db089453c8fa58f1db9c4c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
A.8 | B.9 | C.10 | D.11 |
您最近一年使用:0次
2020-05-08更新
|
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|
2卷引用:上海市华东师范大学第三附属中学2021-2022学年高二下学期3月月考数学试题
名校
9 . 已知函数
,若对于正数
,直线
与函数
的图象恰有
个不同交点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d444d2ca32dbf5ba01ce72391f5d605.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccec6a978a64616bf26ff67aeedd0e8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2a87c4ba9f341a9d01c6ce7422273ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbeedfeeb6d3fe123b6170962b97aeb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2def5aa62f497709e1bd8258583d62fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d444d2ca32dbf5ba01ce72391f5d605.png)
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2019-11-08更新
|
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|
2卷引用:上海市洋泾中学2018—2019学年高三下学期3月月考数学试题
10 . 如果等差数列
的公差都为
,若满足对于任意
,都有
,其中
为常数,
,则称它们互为“同宗”数列.已知等差数列
中,首项
,公差
,数列
为数列
的“同宗”数列,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
__________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e567d7e9761951a266953c8d5042ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90bfe21c96489cb30c544d49ddb4c1c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a796580520e9040ecb7f9fbae6b86262.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e36bff57bcfa86432b340e25e51d42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5c1344592c925b273f2cb9b9e47ebbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e739b252a054c17ae64145250bcba16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
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2019-11-08更新
|
303次组卷
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2卷引用:2019年上海市南洋中学高三上学期10月学习能力诊断测数学试题