1 . 已知无穷数列
中,
是以10为首项,以
为公差的等差数列,
是以
为首项,以
为公式的等比数列
,对一切正整数
,都有
.设数列
的前
项和为
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20655342f9ace8b50a50f5eae6f37beb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b74eb8a7738402df52d4a97262b85ca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142876945177d2d9621b6842e3d51f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e0af2dc59419e7a5e2d093c3d0d42a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c453d55bd2873e4469273132c421e7b3.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/08eb71ecf8d733b6932f4680874dbbf3.png)
A.当![]() ![]() | B.当![]() ![]() |
C.当![]() ![]() | D.不存在![]() ![]() |
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2卷引用:江苏省无锡市辅仁高级中学2024届高三下学期高考前适应性练习数学试题
解题方法
2 . 设数列
的前
项和为
,若
,
.
(1)求
,
,并证明:数列
是等差数列;
(2)求
.
![](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/6d8ef4b3665e8085c8fc30da9390cab7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa0dc13236eaa2bd0cdc0f24beea11fe.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a27c112387e56c976489fa484c0d48f.png)
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解题方法
3 . 已知等差数列
的前
项和为
,且
,
,则
是
中的( )
![](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/36ba808c24aeae6a2f34b98ae5ec04ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b61295307377c1aef454bea136fcc1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/099fc0fb2d528480a949402e46d59821.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
A.第28项 | B.第29项 | C.第30项 | D.第32项 |
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4 . 凸五边形有5条对角线,那么凸
边形有( )条对角线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3468a665ac713ab7b400c672f19650a1.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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5 . 在等差数列
中,已知
则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb69e5f096441c16b6ad6c4b374bdef3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
A.3 | B.4 | C.5 | D.6 |
您最近一年使用:0次
名校
解题方法
6 . 已知等差数列
的前
项和为
,若
,当
时,有
,则
( )
![](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/c7d9712c3b25f3030e166e136d3a4686.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcecdb4d931cb4240254d9df56855348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9df62f4cf2b9012612ab71ca85a4ce6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f5d6a0f40eeee8064303d63c215fd80.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2024-03-23更新
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1925次组卷
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10卷引用:江苏省百师联盟2024届高三下学期开年摸底联考数学试题
江苏省百师联盟2024届高三下学期开年摸底联考数学试题(已下线)第五套 最新模拟重组精华卷(2月开学考试)辽宁省八市八校2024届度高三第二次联合模拟考试数学试题内蒙古赤峰第四中桥北学分校2024届高三下学期开学摸底联考数学(理)试题陕西省百师联盟2024届高三下学期开年摸底联考理科数学试题(全国卷)陕西省百师联盟2024届高三下学期开年摸底联考文科数学试题(全国卷)山东省菏泽第一中学南京路校区2024届高三下学期开学考试数学试题河北省百师联盟2024届高三下学期开学摸底联考数学试题陕西省西安市长安区第三中学2024届高三下学期开学摸底联考理科数学试题陕西省西安市长安区第三中学2024届高三下学期开学摸底联考文科数学试题
7 . 对于每项均是正整数的数列P:
,定义变换
,
将数列P变换成数列
:
.对于每项均是非负整数的数列
,定义
,定义变换
,
将数列Q各项从大到小排列,然后去掉所有为零的项,得到数列
.
(1)若数列
为2,4,3,7,求
的值;
(2)对于每项均是正整数的有穷数列
,令
,
.
(i)探究
与
的关系;
(ii)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9304e71a623c4412188a800046a970d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e9a724b59c890095baa5cb73e267c44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e9a724b59c890095baa5cb73e267c44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e50dbc39a6a06eb8bd7b295f8cc95a6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4d9c1555c406f37a85ff5ddd2275af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed3926a18ee86236e7cf53467ac04f73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca3c54bcc0bd04c304d6513732584b51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9275bd8ce17fcc4a786510b008414ab0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9275bd8ce17fcc4a786510b008414ab0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29422ba63f79b2087f0dcce4879d8c78.png)
(1)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf9f50605db5d5f8f3a01ee8e474a112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00061b36983bb547aa63f9a9f6222105.png)
(2)对于每项均是正整数的有穷数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf9f50605db5d5f8f3a01ee8e474a112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/131cac59d4d568a27dbb220810dbb014.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ef96396caccbf2f959e9d233f060317.png)
(i)探究
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00061b36983bb547aa63f9a9f6222105.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c496ba1d329d5fd94f4fdb1da8c7cde.png)
(ii)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5de2726fe544faf83d4ab88e9116135.png)
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2024-03-12更新
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3卷引用:江苏省徐州市2024届高三下学期新高考适应性测试数学试卷
8 . 已知正项数列
的前n项和为
,且
.
(1)求数列
的通项公式;
(2)若
,求数列
的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1776c2e71b0b25d84156d526c8984c62.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/877b4c548bc2a96a064a6d2a1e874a93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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|
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3卷引用:2024届江苏省南通市徐州市高三2月大联考模拟预测数学试题
9 . 已知等差数列
和等差数列
的前
项和分别为
,
,
,
.
(1)求数列
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/034ba25825c13725931c483aa47c9363.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6403597ee5c99469e6053ae566a9469.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00147ca04fe49733ef62237fd4c3ecd7.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/bf83e20035c3afd6d26ebfd53d768a70.png)
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2024·全国·模拟预测
名校
10 . 记递增的等差数列
的前
项和为
.若
,则
( )
![](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/be9e8bb7cde788a6059cd9ee9a60531b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5af1f1b7e9e20d799ee3c06b89a0611c.png)
A.![]() | B.125 | C.155 | D.185 |
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|
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3卷引用:江苏省姜堰中学2024届高三下学期阶段性测试(2.5模)数学试题