名校
解题方法
1 . 已知定义域为
的偶函数
满足
,且当
时,
,若将方程
实数解的个数记为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e7bebd637ed0828fdcc578537941aa5.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87e04b4cd16224102ef696222caa56ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1376168658dbe7f5b7f4d75fb1db545a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a18ca67c2770b98f36dbfd802595a95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ed105a1181ec4d5678ce4358097b168.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e7bebd637ed0828fdcc578537941aa5.png)
您最近一年使用:0次
2 . 点S是直线
外一点,点M,N在直线
上(点M,N与点P,Q任一点不重合).若点M在线段
上,记
;若点M在线段
外,记
.记
.记
的内角A,B,C的对边分别为a,b,c.已知
,
,点D是射线
上一点,且
.
(1)若
,求
;
(2)射线
上的点
,
,
,…满足
,
,
(i)当
时,求
的最小值;
(ii)当
时,过点C作
于
,记
,求证:数列
的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/710ec0e2f57b863122c39622141adb41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e22f3ed6e3e1aa96415e8b735bd6f6b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aae34c78a65e740d8816ad9b78846ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/272867d48283a6f437c142d6b129df1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa1466856bf2570685d3629c1f813748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/266312b6f9b6b90356d036ba58194305.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0db0efca586470244e8b9348b9f6dce1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
(2)射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fb44db1dc864ff4901be1e10da79747.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b104090ea2ac34be58a76a4e0e95cb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df1d9b712b639c8b6809c9f3ae03706.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd2e92fb281ea5cc9e19fb36b0004dcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65a40142c84be68ee2918c3a8303388c.png)
(i)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfd09fb9482124fd35f19b86894648f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/456e29e6f738aa0f4c2c208bc10e4886.png)
(ii)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59b2400d72b1e3145cb21ba719d8a968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6a9f03a8746152eadb99d03a0079c77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf83e20035c3afd6d26ebfd53d768a70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94840459dfcff33b5c6ff537f1860664.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/382c9b2bad23beed73047f9dbc38b405.png)
您最近一年使用:0次
2024-04-23更新
|
730次组卷
|
3卷引用:湖北省武汉市汉铁高级中学2024届高考数学考前临门一脚试卷
解题方法
3 . 如果
,记
为区间
内的所有整数.例如,如果
,则
;如果
,则
或3;如果
,则
不存在.已知
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26039f31af6cacb74636a90ae4df9b40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4562f3225c98cf5cb11b47d98c9cc9c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e8a094f3cc5dfbcdf2579830faccab2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c38da3ff65e3aa467094a04c37979d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377b5d6a1db57c02d6fa64e9e55fe8bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/583b10b1050c1de417cf05733d9943f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b174dbab52ccacf8fd89bb156ef025.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d88bc255deebebc07d5312cf8c46df4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f2caedee92c1cb1cadcdb1c7bc0261f.png)
A.36 | B.35 | C.34 | D.33 |
您最近一年使用:0次
4 . 设数列
满足
,
,若
且数列
的前
项和为
,则
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6672b832da87660e7919ea3f7d50bf0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bac4b6e74bc72823d31a2fd52856d14.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/a6860decbe10321e6e90e0480ed35dc8.png)
您最近一年使用:0次
2024-03-21更新
|
1217次组卷
|
6卷引用:湖北省十一校2024届高三联考考后提升数学模拟训练一
湖北省十一校2024届高三联考考后提升数学模拟训练一安徽省舒城中学2023-2024学年高二下学期开学考试数学试卷吉林省长春市绿园区长春市文理高中2023-2024学年高二下学期4月月考数学试题湖南省衡阳市衡阳县第一中学2023-2024学年高二下学期4月期中考试数学试题(已下线)第5套 新高考全真模拟卷(二模重组)(已下线)专题3 复杂递推及斐波那契数列相关二阶递推问题【练】(高二期末压轴专项)
5 . 英国数学家泰勒发现的泰勒公式有如下特殊形式:当
在
处的
阶导数都存在时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661a2ffa74a30c0b1c0a0ea0fdc8bb3c.png)
.注:
表示
的2阶导数,即为
的导数,
表示
的
阶导数,该公式也称麦克劳林公式.
(1)根据该公式估算
的值,精确到小数点后两位;
(2)由该公式可得:
.当
时,试比较
与
的大小,并给出证明;
(3)设
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f1d8cb672db61735be7cbcd3d50bf9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661a2ffa74a30c0b1c0a0ea0fdc8bb3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10acd6d864583617dd3e71240bf0c857.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35993bd1db970330494665d925c0be7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(1)根据该公式估算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f67aace59c071f37a444495678497ef0.png)
(2)由该公式可得:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63ba15a427babacf319deb9c4dd8d58b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ea093173f74807332e08bde42f25e22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efd9f874878e11c3fa25143023e8f95a.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af5cf9c12181dd8683944b2b30bf8e08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa80dea5928f0be2b39075a434742686.png)
您最近一年使用:0次
2024-03-14更新
|
3348次组卷
|
12卷引用:湖北省八市2024届高三下学期3月联考数学试卷
湖北省八市2024届高三下学期3月联考数学试卷江苏省连云港市东海高级中学2023-2024学年高二下学期强化班第一次月考数学试题(已下线)第10题 导数压轴大题归类(2)(高三二轮每日一题)河南省南阳市西峡县第一高级中学2023-2024学年高二下学期第一次月考数学试卷安徽省蚌埠市第二中学2023-2024学年高二下学期3月月巩固检测数学试题江苏省苏州市张家港市沙洲中学2023-2024学年高二下学期3月阶段性测试数学试题山西省晋城市第一中学校2023-2024学年高二下学期第二次调研考试数学试题广东省东莞市外国语学校2023-2024学年高二下学期第一次阶段性考试(4月)数学试题河南省许昌市禹州市高级中学2024届高三下学期4月月考数学试题吉林省长春市第二中学2023-2024学年高二下学期第一学程考试(4月)数学试题(已下线)压轴题05数列压轴题15题型汇总-1甘肃省兰州市第五十八中学2024届高三第二次高考仿真考试数学试题
名校
解题方法
6 . 在密码学领域,欧拉函数是非常重要的,其中最著名的应用就是在RSA加密算法中的应用.设p,q是两个正整数,若p,q的最大公约数是1,则称p,q互素.对于任意正整数n,欧拉函数是不超过n且与n互素的正整数的个数,记为
.
(1)试求
,
,
,
的值;
(2)设n是一个正整数,p,q是两个不同的素数.试求
,
与φ(p)和φ(q)的关系;
(3)RSA算法是一种非对称加密算法,它使用了两个不同的密钥:公钥和私钥.具体而言:
①准备两个不同的、足够大的素数p,q;
②计算
,欧拉函数
;
③求正整数k,使得kq除以
的余数是1;
④其中
称为公钥,
称为私钥.
已知计算机工程师在某RSA加密算法中公布的公钥是
.若满足题意的正整数k从小到大排列得到一列数记为数列
,数列
满足
,求数列
的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbc89a53c03cb86fb653bb82128f6cba.png)
(1)试求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ccc57e5668f2a2c1cbc078a767b6855.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00f51f00d1a8a2f57f9e91d1f0264361.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c48460227f1fa924963cbc7878335152.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31457b25a8c32ecb910058736b337a49.png)
(2)设n是一个正整数,p,q是两个不同的素数.试求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0c104e0377b841ff77ab48b63e90470.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/647a247eba3658ab991c7f88f877f3b1.png)
(3)RSA算法是一种非对称加密算法,它使用了两个不同的密钥:公钥和私钥.具体而言:
①准备两个不同的、足够大的素数p,q;
②计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/617a64377b9f00c58ebe10841c402e32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbc89a53c03cb86fb653bb82128f6cba.png)
③求正整数k,使得kq除以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbc89a53c03cb86fb653bb82128f6cba.png)
④其中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fee0c3b8386825011b6f2b74f18069a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ceb955cff0a243b938fe2d2d1e8a5dc.png)
已知计算机工程师在某RSA加密算法中公布的公钥是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5880d2e3f1a34188bf67a29e8de52f99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41b124fdd8b8097233e3d15417a779f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d9b38646bc714b68d44b7c954e7f4c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2024-03-14更新
|
1143次组卷
|
4卷引用:湖北省武汉市洪山高级中学2024届高三下学期第2次模拟考试数学试卷
7 . 同余定理是数论中的重要内容.同余的定义为:设a,
,
且
.若
则称a与b关于模m同余,记作
(modm)(“|”为整除符号).
(1)解同余方程
(mod3);
(2)设(1)中方程的所有正根构成数列
,其中
.
①若
(
),数列
的前n项和为
,求
;
②若
(
),求数列
的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/538f8c7f224b743a48128033066b34cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f6b18b109a656b62fb173680ae99ca7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e34f42b3be15518c29e3689c9fe6d6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d71082924d5b4349c3b0152930b7b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a07e47345c46575e63ff4c3df4557bc.png)
(1)解同余方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44b31b29e7f0705c981bd91329bcfee7.png)
(2)设(1)中方程的所有正根构成数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c002c44d45907aad22da19859193270b.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5653b60d16ec4e653518f0562680250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37a59558292ad6b3d0978bfd7484990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/addee6ce5163a2580888ce2da22714af.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91ac8a1dc1eda952f7145a08c047ebf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37a59558292ad6b3d0978bfd7484990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2024-02-03更新
|
2831次组卷
|
9卷引用:湖北省武汉市华中师大第一附中2023-2024学年高二下学期数学独立作业(一)
湖北省武汉市华中师大第一附中2023-2024学年高二下学期数学独立作业(一)安徽省合肥市第一中学2024届高三上学期期末质量检测数学试题(已下线)压轴题函数与导数新定义题(九省联考第19题模式)练(已下线)新题型01 新高考新结构二十一大考点汇总-3重庆市万州二中教育集团2023-2024学年高二下学期入学质量监测数学试题(已下线)黄金卷08(2024新题型)(已下线)题型18 4类数列综合浙江省部分学校联考2024届高三高考适应性测试数学试题广东省揭阳市普宁市华美实验学校2023-2024学年高二下学期第一次阶段考试数学试题
8 . 意大利数学家斐波那契在研究兔子繁殖问题时,发现了这样一个数列:1,1,2,3,5,8,…,这个数列的前两项均是1,从第三项开始,每一项都等于前两项之和.人们把这样的一列数组成的数列
称为斐波那契数列,并将数列
中的各项除以3所得余数按原顺序构成的数列记为
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/644f94297a84a8edbda26f1e408444e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/644f94297a84a8edbda26f1e408444e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98429f6d9934d68080957db4e2368279.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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9卷引用:湖北省部分高中联考协作体2023-2024学年高三上学期期中考试数学试卷
湖北省部分高中联考协作体2023-2024学年高三上学期期中考试数学试卷安徽省阜阳市第三中学2023-2024学年高二上学期一调考试(10月月考)数学试题辽宁省部分学校2023-2024学年高三上学期11月期中考试数学试题湖南省衡阳市衡南县2023-2024学年高三上学期11月期中联考数学试题福建省部分校2024届高三上学期期中考试数学试题辽宁省抚顺市六校协作体2024届高三上学期期中数学试题(已下线)【一题多变】斐波那契数列 归纳裂项(已下线)第1套 复盘提升卷(模块二 2月开学)(已下线)模块五 专题4 全真能力模拟4(人教B版高二期中研习)
名校
解题方法
9 . 已知等差数列
满足
,且
,
,
成等比数列.
(1)求
的通项公式;
(2)设
,
的前
项和分别为
,
.若
的公差为整数,且
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ccd2974f22054e744baf11dc860fb78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9b4da80b3004da4b8dbc8b5befdfdf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](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/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2edb4f87cd2e6eb70de310f113bcf78d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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4卷引用:湖北省沙市中学2022-2023学年高二下学期5月月考数学试题
10 . 已知数列
满足
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/060c880252326cb449d8253539d92aff.png)
(1)判断数列
是否是等比数列?若是,给出证明;否则,请说明理由;
(2)若数列
的前10项和为361,记
,数列
的前n项和为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/390636a89883bd64bf8da9bf8654aff9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/060c880252326cb449d8253539d92aff.png)
(1)判断数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf33b2a94eae16760d746f9b4b8dbc.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04053ecf80b3bb9179c8baab47bf8dae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffc0cf1f0a00718b95a2a4fffd11dd32.png)
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