2024高三·全国·专题练习
1 . (1)已知{an},{bn}都是等差数列.若a1+b10=9,a3+b8=15,则a5+b6=______ .
(2)设等差数列{an}的前n项和为Sn.若S3=9,S6=36,则a7+a8+a9=______ .
(3)已知Sn是等差数列{an}的前n项和.若a1=-100,
-
=6,则S100=______ .
(2)设等差数列{an}的前n项和为Sn.若S3=9,S6=36,则a7+a8+a9=
(3)已知Sn是等差数列{an}的前n项和.若a1=-100,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a60b42c8031db209eb0605f1efe2fbdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5e3f5a061e2cf401b9368b15882abe3.png)
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2 . 从集合
中随机抽取若干个数(大于等于一个).
(1)求这些数排序后能成等比数列的概率;
(2)求这些数排序后能成等差数列的概率.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/413329e3f2a9acb9ba5084310261965a.png)
(1)求这些数排序后能成等比数列的概率;
(2)求这些数排序后能成等差数列的概率.
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2024高三·全国·专题练习
3 . 设自然数
,有
个实数,排成下面的方阵:
;
;
……………………
.
已知每一行
个数都构成以1为首项的等差数列,第
行等差数列的公差为
.
(1)若
,试判断
的关系;
(2)若最后一列
个数
构成等差数列,若存在
的多项式
使得
成立,试探求
与
的关系?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bcfc48f9bc23cc43085bdb910e7a136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ceef1abeeef220b4fe5f7d96feedd90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00209f6c5d2feb880736deb031150191.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/858a8a41d973808a239e326184d2cd56.png)
……………………
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/029256d4c8550111a46a41b3d8fca67c.png)
已知每一行
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54727b875dbbb83c889a10e23baa3c12.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5260256acb30912078fe896a2f1ca009.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/831ccb61fbf80599e84aaa402b16f1d8.png)
(2)若最后一列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d929a477458ccede6950203fd98ab00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53147bd555731b570d0208ff92909936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/732ccb3ed893ef209fb6819667890f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43c63c23825e61ec74a0851c8b9f591d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7b8affe918970e504f77ff8cb38a178.png)
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名校
解题方法
4 . 在等差数列
中,
,下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dfa0f09f38245af5edccf4e9a092cd2.png)
A.![]() | B.![]() |
C.![]() | D.若![]() ![]() ![]() |
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解题方法
5 . 斐波那契数列
以如下递归的方法定义:
,若斐波那契数列
对任意
,存在常数
,使得
成等差数列,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22ffff4c6f96fe971868a6e14a483b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e97769855336d73371930df1f187875e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cd5371a6f0f82c65dd22f75f8b807c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e2d5952f90c3a10f0f80f615b8e1b8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18938707dd88a824c9f6d9b1870b56e9.png)
A.1 | B.3 | C.![]() | D.![]() |
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解题方法
6 . 给出下列5个命题:
①在等差数列
中,若
,其中m,n,p,q均为正整数,则一定有
.
②任意两个实数a,c的等比中项为
;
③若等比数列
的公比
,则其前n项和
;
④数列
的通项公式是
,且
,则
.
⑤等差数列
中,前n项和
,有最小值,则公差
;
其中正确命题的序号为( )
①在等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/095397b70a73758437ba2198b61fd79b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb679318d0c9819b82e51a1750b502a.png)
②任意两个实数a,c的等比中项为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/169b55e4b8203bc7fa3597229de648ec.png)
③若等比数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45482d31d1d7448c9f3922b4d2a55331.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7653925d3f05c893cfe08c7c22f3751.png)
④数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b39bacf2989caafaba2ed8d36171f912.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90eb772927e69564d3ae98f716fa4ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c88248a34d270530f9d01570a911878.png)
⑤等差数列
![](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/4f8e68eb4ade6e22982d2df5102d8894.png)
其中正确命题的序号为( )
A.②④ | B.③⑤ | C.①⑤ | D.③④⑤ |
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名校
7 . 现有茶壶九只,容积从小到大成等差数列,最小的三只茶壶容积之和为0.5升,最大的三只茶壶容积之和为2.5升,则从小到大第5只茶壶的容积为( )
A.0.25升 | B.0.5升 | C.1升 | D.1.5升 |
您最近一年使用:0次
2023-05-28更新
|
1434次组卷
|
10卷引用:专题4 等差数列的性质 微点1 等差数列项的性质
(已下线)专题4 等差数列的性质 微点1 等差数列项的性质四川省绵阳市高中2024届高三突击班第零次诊断性考试理科数学试题(已下线)第六章 数列(测试)(已下线)第02讲 等差数列及其前n项和(练习)(已下线)FHsx1225yl187江苏省南通市2023届高三高考前练习数学试题重庆市第一中学2023-2024学年高二上学期期中数学试题(已下线)模块四专题2重组综合练(江西)(8+3+3+5模式)(北师大版高二)江西省宜春市上高中学2022-2023学年高二下学期5月期中考试数学试题(已下线)4.2.1&4.2.2 等差数列的概念与等差数列的通项公式(8大题型)-【题型分类归纳】2023-2024学年高二数学同步讲与练(苏教版2019选择性必修第一册)
2023·全国·模拟预测
解题方法
8 . 设点
在椭圆
内,直线
.
(1)求
与
的交点个数;
(2)设
为
上的动点,直线
与
相交于
两点.给出下列命题:
①存在点
,使得
成等差数列;
②存在点
,使得
成等差数列;
③存在点
,使得
成等比数列;
请从以上三个命题中选择一个,证明该命题为假命题.
注:若选择多个命题分别作答,则按所做的第一个计分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c993e34db40190e64654a10b0c13c672.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d6678a1a5cc14704ecf06a7648ff543.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d4aca03910382accfe738520daf689c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
①存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f23bfdeeaa1efc12f64328e962d395b.png)
②存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8d3db975e7888ac13b4448b874b972d.png)
③存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8d3db975e7888ac13b4448b874b972d.png)
请从以上三个命题中选择一个,证明该命题为假命题.
注:若选择多个命题分别作答,则按所做的第一个计分.
您最近一年使用:0次
9 . 已知数列
是等差数列,
,
,
,
是互不相同的正整数,且
,若在平面直角坐标系中有点
,
,
,
,则下列选项成立的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f1cefacc0165c52fe4e977c521c053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14fd7ada0a8ce04b8e0b4713095a6318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2747092b2d69409413ed1c241e6893c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01a837820ba13c974937c098466182cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8a99dc1f486d294480ac5aa655c5906.png)
A.![]() | B.![]() |
C.直线![]() ![]() | D.直线![]() ![]() |
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名校
解题方法
10 . 数列
是等差数列,
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf2e233e185c51f9abcdb7d3bcd430f3.png)
A.![]() | B.若![]() ![]() ![]() |
C.若![]() ![]() | D.若![]() ![]() |
您最近一年使用:0次
2023-03-31更新
|
2062次组卷
|
4卷引用:华大新高考联盟2023届高三下学期3月教学质量测评数学试题
华大新高考联盟2023届高三下学期3月教学质量测评数学试题(已下线)第二节 等差数列 B素养提升卷人教A版(2019) 选修第二册 数学奇书 第四章 数列 阶段测评(一)(4.1~4.2)(已下线)专题04 数列的概念与等差数列(3)