23-24高三上·北京西城·期末
解题方法
1 . 设
是首项为正数,公比为q的无穷等比数列,其前n项和为
.若存在无穷多个正整数
,使
,则
的取值范围是( )
![](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/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34830bcda80915131d5b7c18b3337323.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
23-24高三上·北京西城·期末
2 . 如图,水平地面上有一正六边形地块
,设计师规划在正六边形的顶点处矗立六根与地面垂直的柱子,用以固定一块平板式太阳能电池板
.若其中三根柱子
,
,
的高度依次为
,则另外三根柱子的高度之和为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/5/2bc5de60-9da8-4731-acc2-eaeae623141a.png?resizew=125)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6f1cd65c246e928ee9f3c79710648fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e5e3262600b50c112924b5cc14194e4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/5/2bc5de60-9da8-4731-acc2-eaeae623141a.png?resizew=125)
A.47m | B.48m | C.49m | D.50m |
您最近一年使用:0次
3 . 对于给定的奇数
,设
是由
个实数组成的
行
列的数表,且
中所有数不全相同,
中第
行第
列的数
,记
为
的第
行各数之和,
为
的第
列各数之和,其中
.记
.设集合
或
,记
为集合
所含元素的个数.
(1)对以下两个数表
,
,写出
,
,
,
的值;
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/2/e69407e7-892f-4a4f-952f-72fcf655e5f4.png?resizew=138)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/2/c396e40f-d96e-4dad-b60b-54bbd480977d.png?resizew=138)
(2)若
中恰有
个正数,
中恰有
个正数.求证:
;
(3)当
时,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84de01db26d435ab45acdf26cfefe625.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/823b5260d6b24cc69747c0455c879b7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/267e1fe5e16e9dc9641c7736528e1235.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/449fa836b7477adb5c394b8e67af6a87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02eca2f89985a104ddeebdf89629ade7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7600d2cfbdc6146db96cc545706004f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f76063c9d41d3398308bf7d25938d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9164331fb78ebe6059e69060f3ab302a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d418009b040d5e5192d28417b459890.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63e75ee8469247f599502aec2f2ee552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b811354062228d1e2e090aa587259c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
(1)对以下两个数表
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9d98b87ea379019dea6dbd58ebaf19f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebed69dd5f3ef7ff5eccd8031e4771ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc8b030e661224065ec16aa272782b44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a135dc0cf986199b13a3ce1106379e16.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/2/e69407e7-892f-4a4f-952f-72fcf655e5f4.png?resizew=138)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/2/c396e40f-d96e-4dad-b60b-54bbd480977d.png?resizew=138)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7de7bdfbb18abcc2d1575d1228489f56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93f4518b3c93a17e13fc06affa23e519.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31eb153a2133b41486193e3c3b633d3c.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c7a1d739890a8951586e23b78b035bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8181afecca9a1adc761a2184543fd2e5.png)
您最近一年使用:0次
4 . 一般地,对于数列
,如果存在一个正整数
,使得当
取每一个正整数时,都有
,那么数列
就叫做周期数列,
叫做这个数列的一个周期.给出下列四个判断:
①对于数列
,若
,则
为周期数列;
②若
满足:
,则
为周期数列;
③若
为周期数列,则存在正整数
,使得
恒成立;
④已知数列
的各项均为非零整数,
为其前
项和,若存在正整数
,使得
恒成立,则
为周期数列.
其中所有正确判断的序号是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee1859625c6426af1238df10f5eb101a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
①对于数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30bd8b5f3fc8568d956041e0b95c9b74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13ba4abd36940555995680af94d1a0bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e08febc4860b458ef9de6c0d7854dd21.png)
④已知数列
![](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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b76b70a1c9c66d561996a2a3b389958.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
其中所有正确判断的序号是
您最近一年使用:0次
解题方法
5 . 在八张亚运会纪念卡中,四张印有吉祥物宸宸,另外四张印有莲莲.现将这八张纪念卡平均分配给4个人,则不同的分配方案种数为( )
A.18 | B.19 |
C.31 | D.37 |
您最近一年使用:0次
解题方法
6 . 在中国文化中,竹子被用来象征高洁、坚韧、不屈的品质.竹子在中国的历史可以追溯到远古时代,早在新石器时代晚期,人类就已经开始使用竹子了.竹子可以用来加工成日用品,比如竹简、竹签、竹扇、竹筐、竹筒等.现有某饮料厂共研发了九种容积不同的竹筒用来罐装饮料,这九种竹筒的容积
(单位:L)依次成等差数列,若
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d09d8084c6590784775495f12d5e8e81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66a980ae9cfbae2e223ca751031f10a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92d4dc8726d391817119ac4370899d13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a004bc7c90ab090e76a37d3a4c58fb3.png)
A.5.4 | B.6.3 |
C.7.2 | D.13.5 |
您最近一年使用:0次
名校
解题方法
7 . 已知数列
为有穷正整数数列.若数列A满足如下两个性质,则称数列A为m的k减数列:
①
;
②对于
,使得
的正整数对
有k个.
(1)写出所有4的1减数列;
(2)若存在m的6减数列,证明:
;
(3)若存在2024的k减数列,求k的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/281440c5e428da28c0a40fecbb87a83a.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed25314606b875ae6cdfa2d073c73c85.png)
②对于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/937c09d82c480e4d67f8a48d3f66c5f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad7ae1214cc78e72fb613d7e649bc27b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4b3392579424244c50ddf416ee3434d.png)
(1)写出所有4的1减数列;
(2)若存在m的6减数列,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f409ce4e6aa8638fe5880009dbb732f7.png)
(3)若存在2024的k减数列,求k的最大值.
您最近一年使用:0次
2024-01-25更新
|
3791次组卷
|
9卷引用:北京市通州区2024届高三上学期期末摸底考试数学试题
北京市通州区2024届高三上学期期末摸底考试数学试题江西省赣州市南康中学2024届高三“九省联考”考后模拟训练数学试题(一)安徽省合肥一六八中学2024届高三“九省联考”考后适应性测试数学试题(二)2024届广东省新改革高三模拟高考预测卷一(九省联考题型)数学试卷(已下线)(新高考新结构)2024年高考数学模拟卷(三)(已下线)信息必刷卷01湖南省长沙市雅礼中学2024届高三下学期数学月考试卷(八)(已下线)数学(江苏专用01)山东省日照市五莲县第一中学2024届高考模拟预测(一)数学试题
8 . 对于数列
,如果存在正整数
,使得对任意
,都有
,那么数列
就叫做周期数列,
叫做这个数列的周期.若周期数列
,
满足:存在正整数
,对每一个
,都有
,我们称数列
和
为“同根数列”.
(1)判断下列数列是否为周期数列.如果是,写出该数列的周期,如果不是,说明理由;
①
;②![](https://staticzujuan.xkw.com/quesimg/Upload/formula/099bc7c08d8b8443b50071ff69829e16.png)
(2)若
和
是“同根数列”,且周期的最小值分别是3和5,求证:
;
(3)若
和
是“同根数列”,且周期的最小值分别是
和![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8401bb16895bde1550fb7cb6047c777d.png)
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034983375860d2b404f6fbd7d40a44b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b2b94cbf8f1acc77ed2618d9ba5756a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ef4c4439b36c2847b0056a116d56d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1fc456524522ac2f9deb58b33ddf09c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/612810822d7916c0588ecf4343fc0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ef4c4439b36c2847b0056a116d56d4.png)
(1)判断下列数列是否为周期数列.如果是,写出该数列的周期,如果不是,说明理由;
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f29e0d93f2a15a999afd25599578b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/099bc7c08d8b8443b50071ff69829e16.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c88248a34d270530f9d01570a911878.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f2c1ec3153d6b86778f01cb90027029.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8401bb16895bde1550fb7cb6047c777d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d28c81912638cdbdf0dfe606cd22974.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
解题方法
9 . 在某次数学探究活动中,小明先将一副三角板按照图1的方式进行拼接,然后他又将三角板
折起,使得二面角
为直二面角,得图2所示四面体
.小明对四面体
中的直线、平面的位置关系作出了如下的判断:①
平面
;②
平面
;③平面
平面
;④平面
平面
.其中判断正确的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ec2524be492bca0d1566bf848066f10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf6dc837ae85207789b94d109c5c2eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf6dc837ae85207789b94d109c5c2eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
A.1 | B.2 |
C.3 | D.4 |
您最近一年使用:0次
2024-01-22更新
|
1335次组卷
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7卷引用:北京市丰台区2023-2024学年高三上学期期末练习数学试卷
北京市丰台区2023-2024学年高三上学期期末练习数学试卷(已下线)高三数学开学摸底考 (北京专用)2024年全国普通高中九省联考仿真模拟数学试题(二)(已下线)第四章 立体几何解题通法 专题五 平移变换法 微点3 平移变换法综合训练【培优版】(已下线)第14讲 8.6.3平面与平面垂直(第1课时 )-【帮课堂】(人教A版2019必修第二册)(已下线)13.2.4 平面与平面的位置关系(2)-【帮课堂】(苏教版2019必修第二册)(已下线)专题05 立体几何初步(2)-期末考点大串讲(苏教版(2019))
10 . 对于项数为
的数列
,若数列
满足
,
,其中,
表示数集
中最大的数,则称数列
是
的
数列.
(1)若各项均为正整数的数列
的
数列是
,写出所有的数列
;
(2)证明:若数列
中存在
使得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cce3b6654490dcd8177970631e929d3d.png)
,则存在
使得
成立;
(3)数列
是
的
数列,数列
是
的
数列,定义
其中
.求证:
为单调递增数列的充要条件是
为单调递增数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb951647594b67c82045b7ba69f57cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c3bd239656c2ef509ed9f2a91a68317.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfd88e35dc6c2b82b4bb29475d37c015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cda05b106f920bbcfa02320229ca3c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/698f45c9ed5bb04924f1037107e76988.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c3bd239656c2ef509ed9f2a91a68317.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb951647594b67c82045b7ba69f57cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(1)若各项均为正整数的数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb951647594b67c82045b7ba69f57cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c2f32a17f0261d32079efed31d414a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb951647594b67c82045b7ba69f57cd.png)
(2)证明:若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb951647594b67c82045b7ba69f57cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50a272adba0f1120109824440f0e252c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cce3b6654490dcd8177970631e929d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6afadbd5dc4d8003ac2a0c85678dbecf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4578089af6806bf1257491091b924d3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c2dd6a827492dffddd07e621a4bbe36.png)
(3)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c3bd239656c2ef509ed9f2a91a68317.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb951647594b67c82045b7ba69f57cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4af75cc7d8cc976dce8bf9bd8fdc18f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/defa9f328d5108bbec5c56eebfe95567.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d019d9549df6aed0dab378301d889ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70322214e5c9d9a8df10eb45930f5745.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb2e86a5aa896bef041701e0e1771ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8504784fec514a92d845910c6721c3a.png)
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