名校
解题方法
1 . 1.设数列
中前两项
、
给定,若对于每个正整数
,均存在正整数
使得
,则称数列
为“
数列”.
(1)若数列
为
、
的等比数列,当
时,试问
与
是否相等,并说明数列
是否为“
数列”﹔
(2)讨论首项为
、公差为
的等差数列
是否为“
数列”,并说明理由;
(3)已知数列
为“
数列”,且
,
,记
,其中正整数
,对于每个正整数
,当正整数
分别取1、2、…、
时,
的最大值记为
,最小值记为
,设
,当正整数
满足
时,比较
与
的大小,并求出
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99a22f5023293a85d8381277769d68dc.png)
![](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/3bcfc48f9bc23cc43085bdb910e7a136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53c09fba64f3bc86dac3e29bf56b018.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2b608c12c4e7b9e6d7561be763c6733.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
(1)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99a22f5023293a85d8381277769d68dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9dae8e6c9b93458f324f30538a3eb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bcfc48f9bc23cc43085bdb910e7a136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0055ef3b9c21a572f6cc0a79cdce9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99a22f5023293a85d8381277769d68dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
(2)讨论首项为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
(3)已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1bae03ee4ac75dacfb026290e4207dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f966272f7781790ff27e40db6b525253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a07186f6469ba083a12864ddee551246.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/918893290e48bba154bd5a14a805f10f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bcfc48f9bc23cc43085bdb910e7a136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aadf9ab510510120699c5eee39ab18b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf57ba4761db4d3fc993ae5815325bb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ddad3d9fdb5e9951b6a1c31f9a72a71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0a625b91e0eba33b107550ee2a1e2f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/717d039b3a4967ca6b0a899bfd12a83b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/268b0a589ddfd494ebc898a556c260bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e95931effbd59c43e8ed1ea09962b84f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
您最近一年使用:0次
2021-12-10更新
|
811次组卷
|
4卷引用:江西省安福中学2021-2022学年高二上学期开学考试数学(理)试题
江西省安福中学2021-2022学年高二上学期开学考试数学(理)试题上海市上海师范大学附属中学2020-2021学年高一下学期期末数学试题上海市格致中学2022届高三上学期12月月考数学试题(已下线)专题03 《数列》中的压轴题-2021-2022学年高二数学同步培优训练系列(苏教版2019选择性必修第一册)
名校
2 . 若直线
与两曲线
分别交于
两点,且曲线
在
点处的切线为
,曲线
在
点处的切线为
,则下列结论:
①
,使
;②当
时,
取得最小值;
③
的最小值为2;④
.
其中所有正确结论的序号是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54b53b86bd516400d6fa7dabb3603f31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26c7605338f5766155296b13cf99147.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eae1b87c23b45ce5e5e74d5b1d73234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5db192285632d1991b4ee7a003a52205.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d115cf2f2e63304d4f31946db866de4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a93a52c2b943e4c70ace99ed802d2b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a93a52c2b943e4c70ace99ed802d2b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4dfec890cdfdda355e19463f3be813.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4dfec890cdfdda355e19463f3be813.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14efb0184968017766c8f60cf6fc31a1.png)
其中所有正确结论的序号是( )
A.① | B.①②③ |
C.①②④ | D.①②③④ |
您最近一年使用:0次
2021-12-04更新
|
1269次组卷
|
6卷引用:江西省抚州市临川第一中学2021-2022高二12月月考数学(文)试题
江西省抚州市临川第一中学2021-2022高二12月月考数学(文)试题江西省宜春市上高二中2022届高三5月第十次月考数学(理)试题四川省宜宾市普通高中2022届高三上学期第一次诊断测试理科数学试题(已下线)专题3-5 超难压轴小题:导数和函数归类(2)-2022年高考数学毕业班二轮热点题型归纳与变式演练(全国通用)(已下线)第07讲 利用导数研究函数的单调性(核心考点讲与练)-2021-2022学年高二数学下学期考试满分全攻略(人教A版2019选修第二册+第三册)(已下线)专题08 导数与函数综合压轴(选填题)-2
名校
解题方法
3 . 如图所示,在平面四边形
中,已知
,
,
,记
的中垂线与
的中垂线交于一点
,恰好
为
的角平分线,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5de00c1f5a077f32bbd131614b6ae4c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf3b55f5f7075d1e9cb681db6f3513d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f90318c1a8d868d69fba0e8ab960bfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61e0f366d1c0fdc80f78156df8b248b4.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-07-13更新
|
3519次组卷
|
8卷引用:江西省万安中学2021-2022学年高二上学期开学考试数学(理)试题
江西省万安中学2021-2022学年高二上学期开学考试数学(理)试题江苏省南京师范大学附属中学新高考方向卷2020-2021学年高一下学期期末数学试题(已下线)专题4-2 正余弦定理与解三角形小题归类1-2022年高考数学毕业班二轮热点题型归纳与变式演练(全国通用)山东省齐鲁2021-2022学年3月份高一阶段性质量检测试卷A 江苏省南京市金陵中学2021-2022学年高二下学期6月适应性考试数学试题2023年3月河北省普通高中学业水平合格性考试模拟(十)数学试题(已下线)第11章 解三角形 单元综合检测(难点)--《重难点题型·高分突破》(苏教版2019必修第二册)(已下线)压轴小题14 定角类解三角形问题
名校
解题方法
4 . 已知数列
的前
项和为
,数列
的前
项和为
,满足
,
,
,且
.若存在
,使得
成立,则实数
的最小值为( )
![](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/034ba25825c13725931c483aa47c9363.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/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd6e8432f17b72f27c1dc23d118a8049.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2725a89d93c791f7a0098f4964587905.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb79943b49697181bda64d5f9e35c25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaf8c7729c80bb4ccf9e2b89781f95ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-05-07更新
|
772次组卷
|
2卷引用:江西省宜春市铜鼓中学2020-2021学年高一(实验班)下学期第一次月考数学(理)试题
名校
5 . 设等差数列
的公差为
前
项和为
且
则
的取值范围是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/814d72e9996cb40000585f8ce6695a45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/117464f527849ab995858aaa20f4175b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2e73352584cdf17623292107a4dd990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b01943ddfc6733cc24442ede2231f6c9.png)
您最近一年使用:0次
2019-11-04更新
|
1091次组卷
|
4卷引用:江西省宜春市铜鼓中学2020-2021学年高一(实验班)下学期第一次月考数学(理)试题
江西省宜春市铜鼓中学2020-2021学年高一(实验班)下学期第一次月考数学(理)试题上海市南洋模范中学2018-2019学年高三下学期开学考试数学试题(已下线)考向20 简单的线性规划-备战2022年高考数学一轮复习考点微专题(上海专用)(已下线)专题6-1 数列函数性质与不等式放缩(讲+练)-1
名校
6 . 已知数列
的各项均为正值,
对任意
,
都成立.
(1)求数列
、
的通项公式;
(2)令
,求数列
的前
项和
;
(3)当
且
时,证明对任意
都有
成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b14f5fdf0e4f9de36f08402dd96d237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a8eea2f9029ae4ce8c9348720395c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa51c8baa664d7444153182b7ff5ecb.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9221c0c92a526f65533cdc5400767af.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ba590f71638ebfbb77e4c1d7bdb64a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46b6d151d3f864bae873987f6db9327a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b710eef0f8ef29b9340e6800859a0f46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f609d4906415d510ea823a39a64d481e.png)
您最近一年使用:0次
2019-10-02更新
|
1349次组卷
|
4卷引用:江西省吉安市吉安县第三中学、安福二中2021-2022学年上学期高二入学考试数学试题
江西省吉安市吉安县第三中学、安福二中2021-2022学年上学期高二入学考试数学试题江西省新余市第四中学2017-2018学年高二上学期第二次段考数学(理)试题江西省宜春市上高县第二中学2019-2020学年高一下学期期末考试数学(理)试题(已下线)专题11 数列前n项和的求法 微点10 数列前n项和的求法综合训练
名校
7 . 已知二次函数
,数列
的前n项和为
,点
均在函数
的图象上.
Ⅰ
求数列
的通项公式;
Ⅱ
设
,
是数列
的前n项和,求使得
对所有的
都成立的最小正整数m.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/409543ee7d3b0df0f42b2ac7b4e131f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe229b24e2d56ff6b491725ceae4ff2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b708c8dcb2d66eb2ce0b3718a9cd924a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea85a0a027ee65549c29bce447e24a45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c7028a5fa4d781d382ca3b73b74796e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe229b24e2d56ff6b491725ceae4ff2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85b11d683fea560c2abf36cdced1e945.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb26cd1601fe7e76e1e2dc0b4909324a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee4464b3b4eb6e52ee02f095aae84f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e87ebe33a64731a1fd4bb18487bd6a74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb8c29b297e3ec337c3139c2a1ebed1b.png)
您最近一年使用:0次
2018-12-11更新
|
781次组卷
|
3卷引用:江西省石城中学2020-2021学年高一下学期第二次月考数学(文)试题
名校
8 . 已知数列
的前
项和为
,且数列
是首项为3,公差为2的等差数列,若
,数列
的前
项和为
,则使得
成立的
的最小值为__________ .
![](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/4dea1dd4ffcb4cf0697ca43079f6a1f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e14eedc2934191808096c1808ca29f21.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dbabc4c8b8b6e2e53a9e13b8db92172.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
2018-08-29更新
|
2527次组卷
|
5卷引用:江西省吉安市第一中学2021-2022学年高二10月第一次段考数学(理)试题
名校
9 . 数列
为单调递增数列,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad88814a0be9a4b5750bc28ebc8c7048.png)
,则
的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad88814a0be9a4b5750bc28ebc8c7048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68efb961550a83f5a52a4fd16917d27c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
2018-02-23更新
|
1350次组卷
|
3卷引用:江西省宜春市铜鼓中学2020-2021学年高一(实验班)下学期第一次月考数学(理)试题
名校
10 . “斐波那契”数列由十三世纪意大利数学家斐波那契发现.数列中的一系列数字常被人们称之为神奇数.具体数列为:
,即从该数列的第三项数字开始,每个数字等于前两个相邻数字之和.已知数列
为“斐波那契”数列,
为数列
的前
项和,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb77963e00bcec465979ce8dfa22e7ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(Ⅰ),则
表示)
您最近一年使用:0次
2017-02-21更新
|
2235次组卷
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2卷引用:江西省南昌市实验中学2021届高2月月考数学(理)试题