1 . 若有穷数列
满足:
,则称此数列具有性质
.
(1)若数列
具有性质
,求
的值;
(2)设数列
具有性质
,且
为奇数,当
时,存在正整数
,使得
,求证:数列
为等差数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef94592b70bea840c747393959c71b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c735a110f4cf68dea9133c78e205b43f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf404363fe0f057007b8e8d90a775d90.png)
(1)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/030ef2d631bb39945bb752932146364b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf404363fe0f057007b8e8d90a775d90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc9927f218d1b9cd9d7a8b979da6c669.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf9f50605db5d5f8f3a01ee8e474a112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e6153f9e3bfe84d3a61f388c7fa2b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd00e20f967cb2bdce939165abd38440.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1c87acdb6ce8286ea7d256b96801507.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
您最近一年使用:0次
2024-06-04更新
|
337次组卷
|
2卷引用:海南省部分学校2024届新高考二卷押题卷(三)数学试题
解题方法
2 . 已知函数
,等差数列
的前
项和为
,记
.
(1)求证:
的图象关于点
中心对称;
(2)若
,
,
是某三角形的三个内角,求
的取值范围;
(3)若
,求证:
.反之是否成立?并请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47665ff46fcf594d4151c3a89707257f.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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7830b11dc2634eb661673a04287ddc6.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ebbb2eab12b76127cc87304c212cdd6.png)
(2)若
![](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/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/155c5f3a5c55e0c95191c5a893f63062.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ca95ba448d33b5e82aa1a3591dc0adf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4615a158e82ab5ff2c3a84f13d1ccda.png)
您最近一年使用:0次
3 . 设数列
,如果A中各项按一定顺序进行一个排列,就得到一个有序数组
.若有序数组
满足
恒成立,则称
为n阶减距数组;若有序数组
满足
恒成立,则称
为n阶非减距数组.
(1)已知数列
,请直接写出该数列中的数组成的所有4阶减距数组;
(2)设
是数列
的一个有序数组,若
为n阶非减距数组,且
为
阶非减距数组,请直接写出4个满足上述条件的有序数组
;
(3)已知等比数列
的公比为q,证明:当
时,
为n阶非减距数组.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51bf78c89d31e0a34f76baf8c42ba704.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3abe6fe94f2816bd11183de116645e6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09a441c252dd62928c766c44c36dd10e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef743e55817feafd36e21622aae8386c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58bcd14fd334351a6c927f0f419d237b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3abe6fe94f2816bd11183de116645e6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/344577f15b63680181de9d6f8cd2e825.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3abe6fe94f2816bd11183de116645e6e.png)
(1)已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05fb5217867b74561fcd73c35bb02e66.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3abe6fe94f2816bd11183de116645e6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef3c1c694015bec3c316eea0532817ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3abe6fe94f2816bd11183de116645e6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4425cdc744bd84ec573d2d25edd91161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c0cdbf7b7cb42491810101c6e0db4ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
(3)已知等比数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c10602e28af07cb88299c1bdc1f2f62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f71acdb04454c77e1e25ad4f336cccfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd181e8548093a1558d5897f8a9a1758.png)
您最近一年使用:0次
名校
解题方法
4 . 已知
为等比数列,其前
项和为
.
(1)求
的通项公式;
(2)记各项均为正数的数列
的前
项和为
,若
,证明:当
时,
.
![](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/79240d5b08d2c7416127a43ee685910a.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)记各项均为正数的数列
![](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/e22ea7777d95aeb0139ac71261d1e2c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0852aa998bbec5848a944a4802436a9.png)
您最近一年使用:0次
5 . 已知数列
的各项均为正数且均不相等,记
为
的前
项和,从下面①②③中选取两个作为条件,证明另外一个成立.
①数列
是等比数列;②
;③
是等比数列.
注:若选择不同的组合分别解答,则按第一个解答计分.
![](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/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
①数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e2de706dc5f0439b989273a5367f63a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30ced72f99d3e93cec09c40f24089b86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf9d317eec143a57c2511b0fb0767d43.png)
注:若选择不同的组合分别解答,则按第一个解答计分.
您最近一年使用:0次
2023-07-24更新
|
256次组卷
|
3卷引用:海南华侨中学2023届高三模拟(二)数学试题
6 . 已知数列
和
满足:
,
,
(
为常数,且
).
(1)证明:数列
是等比数列;
(2)若当
和
时,数列
的前n项和
取得最大值,求
的表达式.
![](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/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66fd4f19859fa547fbacebfa0d33a660.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a5c9405235478ddadadf0a4bd4601f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/472393b18c7880e73b40e31fbe2d951c.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)若当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be604061cf1591f7069472269d4c9719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fac3649308b528fd56545ba102dc42d5.png)
![](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/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
2023-05-21更新
|
1252次组卷
|
5卷引用:海南省2023届高三学业水平诊断(五)数学试题
名校
解题方法
7 . 已知数列
满足:
.
(1)证明:
时,
;
(2)是否存在这样的正数
,使得数列
是等比数列,若存在,求出
值,并证明;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96458e6112018da7a26f2f8318adac51.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df441f1352f4dc4f7ae782b19c5b004e.png)
(2)是否存在这样的正数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2023-05-12更新
|
897次组卷
|
3卷引用:海南省海南中学2023届高三三模数学试题
8 . 记
的内角
的对边分别为
,已知
,
是边
上的一点,且
.
(1)证明:
;
(2)若
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a9069499bd3bd7cc7112eb42d8984f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62a3bf6da4d9823ceaf3ec8b03b44de7.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41ca7e840268b42f41ce1975962382c2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8cabcef1cee1213140371c499339864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba1883c53ebf30a9e53e9b7f3bce4ba.png)
您最近一年使用:0次
2023-03-21更新
|
1288次组卷
|
3卷引用:海南省海口市2024届高三摸底考试数学试题
9 . ①
公比为2,且
是
与
的等差中项;②
且
为递增数列,在①②中任选一个,补充在下列横线上并解答.
已知等比数列
中,
为数列
的前
项和,若___________.
(1)求数列
的通项公式;
(2)若
,记数列
的前
项和
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51779330b8ec91679969387af2cd4f65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a20ad24423a4f10c1a2db0cb5249eccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
已知等比数列
![](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/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d035ce3fa6be9883a488cbcb0458b200.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e30136113176ba7fe660e998d0873157.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/ede8888e1a1782c2d75c8298567761a5.png)
您最近一年使用:0次
10 . 已知正项数列
,
,
,
是公差为2的等差数列.
(1)证明:
是等差数列;
(2)记
为数列
的前n项和,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9b6e51986fe5d7a7265e0e93adcb4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb99ee26a6509d716e90fbec947b6604.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)记
![](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/ce629d93725430e9964c5541e831f1f3.png)
您最近一年使用:0次
2022-07-06更新
|
692次组卷
|
3卷引用:海南省海南中学2023届高三仿真考试数学试题
海南省海南中学2023届高三仿真考试数学试题云南省昆明市2021-2022学年高二下学期期末考试数学试题(已下线)拓展四:数列大题专项训练(35道) -【帮课堂】2022-2023学年高二数学同步精品讲义(人教A版2019选择性必修第二册)