名校
1 . 定义在
上的函数
满足
,且
,则下面四个式子:①
;②
;③
;④
;与![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ae2c52b3ed8a399057da53637ac7dc.png)
相等的式子的序号为_________ (写出所有满足条件的式子的序号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd384d86840b7b158af41f56fe29c7d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6855784817151468771f29c0fc38fc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/317ded343f7889b6ce99fb248c9181b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/957c0efaa3cece5cb7ef1468d391fed3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87b9f97e0f3248a44dc70e0ac77c842e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5199fe04f00ff3eca25ba8723311e0b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ae2c52b3ed8a399057da53637ac7dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09597b9e9e5de228468cc34de4f0f5eb.png)
您最近一年使用:0次
2020-01-13更新
|
73次组卷
|
2卷引用:上海市延安中学2016-2017学年高三下学期开学考试数学试题
名校
解题方法
2 . 设等差数列
的前
项和为
,则有以下四个结论:
①若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99ca47be5a21ea60ebd04dd8945852d8.png)
②若
,且
,则
且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eef1f2c439ad1043f4b0e8892066826.png)
③若
,且在前16项中,偶数项的和与奇数项的和之比为3:1,则公差为2
④若
,且
,则
和
均是
的最大值
其中正确命题的序号为___________ .
![](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)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd67cf18bd35149475d35f1c603ad59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99ca47be5a21ea60ebd04dd8945852d8.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45c65fa15317b33766389407c427668.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/642a443e3315a7fb6489b01fad7e3215.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd3c579e5e0540f190994cbb5b0653a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eef1f2c439ad1043f4b0e8892066826.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b8bdb404dcbe74cd8bbd30de782a8fa.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a8933c07e3651731291184c080766c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c41c4154f019120be078200f2dff6f4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6899bf9cadae2ccdb14cbc87d4f280ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f30f56664446f32dbbc2c5f12a99374.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
其中正确命题的序号为
您最近一年使用:0次
2023-11-26更新
|
505次组卷
|
5卷引用:宁夏银川市唐徕中学2023-2024学年高三上学期期中考试数学(理)试题
宁夏银川市唐徕中学2023-2024学年高三上学期期中考试数学(理)试题北京朝阳区六校联考2024届高三12月阶段性诊断数学试题北京第五中学2023-2024学年高三下学期开学检测数学试卷(已下线)2024年高考数学二轮复习测试卷(北京专用)(已下线)4.2.2 等差数列的前n项和公式——课后作业(提升版)
名校
解题方法
3 . 已知
为等差数列
的前n项和,
为其公差,且
,给出以下命题:
①
;②
;③使得
取得最大值时的n为8;④满足
成立的最大n值为17
其中正确命题的序号为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b2c87f9f5cf3c2e13c4e761eb5d36b4.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2d8bbb4a09e0ac86bbae46222a90841.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5084a907d0a5aab9003b5b342ce14c2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49763402b2f2023f0ba64c37924267d3.png)
其中正确命题的序号为
您最近一年使用:0次
解题方法
4 . 给出下列四个命题:
①若
,则
;
②当
时,
的最小值为4;
③已知
是等差数列
的前
项和,若
,则
;
④过抛物线
焦点
的直线交抛物线于
两点,则
.
其中正确命题的序号为___________ .
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bed0d3e6741e0193addff8cf7b25019c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a68265211ff8205d5c0ea1b5f7e20521.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/409d37d9465ec42be99d13cfbc0bc6b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70ced225ea5590e06ece27b77ad3ac74.png)
③已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28ef6f1b2279af482557a8ea46f2e43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a425978da20cebf8c4c63953579e7b35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6745b23f90d2e3a2bad6048bc734bb08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47af0fa1a8a597e0d1336a5368f47084.png)
④过抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf7b911d5ec34e3ffc72b89285592ff3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/655b6a742dbacdab5aaa298007663dd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0a415f13ef220884d1916203ed4e542.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/669b5240185e8caf113d2b5fb6a453ae.png)
其中正确命题的序号为
您最近一年使用:0次
解题方法
5 . 等差数列
的公差
,
是其前n项和,给出下列命题:若
,且
,则
和
都是
中的最大项;给定n,对于一些
,都有
;存在
使
和
同号;
.其中正确命题的序号为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/812be9806122241c476ba1db516c4823.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2d8bbb4a09e0ac86bbae46222a90841.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/277d63e2ebf03b22f9f110b436342043.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d27182444d3da4003680f07ec299087c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a48e81b54f78b96294295542b010dfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/846fa57d92d6ad44d6a0cafad1e71ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22db6654cd047b8d214e3cda861d2de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/668a397301141b4e3fa8109515847004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf5776ec7059c208daf01ca48a34915.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68040f99c4f1199f33ae9e269b700db0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177e4374fb738c4f13dc58e9025c88e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbc5df9b9a310fa06507207fd1afc048.png)
您最近一年使用:0次
名校
6 . 等差数列
的前
项和为
,若
,公差
,有以下结论:
①若
,则必有
; ②若
,
,则
;
③若
,则必有
; ④若
,则必有
.
其中所有正确结论的序号为______ .
![](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/390636a89883bd64bf8da9bf8654aff9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/812be9806122241c476ba1db516c4823.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63911d261ebb75e0ab8f76b58cbb7a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e93339c2793d3d8add8cd5770d20fb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea6c2e49c873187b12e90a7b4d5d906b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4ce64685821c3e55c07f151996ca8c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b043acaf51edc23e735492fa61e66f4.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea31d9dcfd7fba1b7c90d4c349525ed2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fe9f984aaa409de0dde80189cda4d03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d77bb6b1a5ca128223c897cf09ba19d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b9a959dda5985723ef15d5d31ea6a25.png)
其中所有正确结论的序号为
您最近一年使用:0次
2021-08-03更新
|
624次组卷
|
3卷引用:四川省资阳市2020-2021学年高一下学期期末数学试题
7 . 给出下列四个命题:
①当
时,有
;
②
中,
当且仅当
;
③已知
是等差数列
的前
项和,若
,则
;
④函数
与函数
的图像关于直线
对称.
其中正确命题的序号为__________ .
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c385a8d88836f6cae1255d86c1b6d76a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90d3d04194297b37727db116081a662e.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19dc38d888741a1b2e95fe0773a48c38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca51be437b1a97ca92aa1159ab71102c.png)
③已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](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/effdf8cadd1a54cb5e0f3a621dd4ea80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a68405af59395b5b557581b32f97a5ca.png)
④函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26efb9f32f6cb608753f9189c6b48644.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c67f5cfce32b3ed37987a4baa430062.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
其中正确命题的序号为
您最近一年使用:0次
名校
8 . 学者森德拉姆(Sundaram)发现了一个有意思的素数筛法矩阵,这个矩阵后来在素数研究领域获得广泛应用.我们用
(
)表示矩阵中第i行第j列处的分量,这些分量之间满足如下递推关系:
,
,
,数表局部如下:
关于森德拉姆(Sundaram)素数筛法矩阵,有下列说法
①
; ②
;
③
; ④存在i,
使得
.
其中,所有正确说法的序号是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4ba1bbe411bc71bca016d3fd82352f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd8ad3cf001b89b9df5363d096eacee6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6123377e52f8611dc24eccc0dc29bf40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04230dc33504a3af9682bfcdb71b0921.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/534a7166c49a9f39c31b5d92e66a5b42.png)
4 | 7 | 10 | 13 | 16 | 19 | … |
7 | 12 | 17 | 22 | 27 | 32 | … |
10 | 17 | 24 | 31 | 38 | 45 | … |
13 | 22 | 31 | 40 | 49 | 58 | … |
16 | 27 | 38 | 49 | 60 | 71 | … |
19 | 32 | 45 | 58 | 71 | 84 | … |
… | … | … | …… | … | … | … |
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e10512e15a48cb2b27cc60a90086f94b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01804f36afe15f0327cc8ae450b6294e.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2abebbae7edc68681b50c47aafd9d1dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cfbd6f249dc98fdabe20ec58fbc467c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5b00503e90e7f627e9c85f76d195a54.png)
其中,所有正确说法的序号是
您最近一年使用:0次
9 . 判断正误(正确的填“正确”,错误的“错误”)
(1)已知等差数列的首项、公差,可求S10.( )
(2)在等差数列中涉及a1,d,n,an,Sn五个量,利用方程思想可以“知三求二” .( )
(3)在等差数列{an}中,若a1=2,a9=10,则S9=45.( )
(4)公式an=Sn-Sn-1成立的条件是n∈N*.( )
(1)已知等差数列的首项、公差,可求S10.
(2)在等差数列中涉及a1,d,n,an,Sn五个量,利用方程思想可以“知三求二” .
(3)在等差数列{an}中,若a1=2,a9=10,则S9=45.
(4)公式an=Sn-Sn-1成立的条件是n∈N*.
您最近一年使用:0次
解题方法
10 . 下列说法中,正确的有_______ .(写出所有正确说法的序号)
①在
中,若
,则
;
②在
中,若
,则
是锐角三角形;
③在
中,若
,则
;
④若
是等差数列,其前
项和为
,则三点
、
、
共线;
⑤等比数列
的前
项和为
,若对任意的
,点
均在函数
(
且
,
、
均为常数)的图象上,则
的值为
.
①在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca51be437b1a97ca92aa1159ab71102c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19dc38d888741a1b2e95fe0773a48c38.png)
②在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/336bbf462ae13b146976ef65a58a5969.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
③在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbe02d5a322e6f254bd8d51a5b346c61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b925cbc2194a19c1830b9dd56cf1c4c5.png)
④若
![](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/b3476fd22fa21beabbae9460e1406d45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a906525d675d27085f1ceda8d9996ca5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/564b9b7e76e0fc8685023137b0b7f7ba.png)
⑤等比数列
![](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/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e41f32693d25ece7f8e22c34a183537f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e058d98f8a257226d0fbcc941f72f4fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03b011f69dfc5262a3d82f64676739b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/406185f4ad8bcd99e23adc8d289088ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
您最近一年使用:0次
2020-03-02更新
|
543次组卷
|
2卷引用:四川省蓉城名校联盟2018-2019学年高一下学期期中联考理数试题