1 . 已知数列
和
满足:
,
,且数列
为等差数列.设
,数列
的前n项和为
.
(1)求
与
的通项公式:
(2)若对于任意
均有
,求正整数k的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb1b990814fa3264d6f417708cbd6b8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a34dc4a61026ddf52eca0b868299897.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/092910e683ac87df1b7c643ca80e5c31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6ea96ac2fd51e8a1ac0a945258246a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c88a7ef007c78a93e33bd77c4396626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
(2)若对于任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52496eff03706f07d80093884aaa17f.png)
您最近一年使用:0次
2 . 数列
满足:
,
,
,若
,则
的最大值为______ .
![](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/9888112891953a9a114a196d6c88c6cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eee29b5bf10ccfe1d9418f633c23a014.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fd71bc7e6668f90f259ad0b06dd60c2.png)
您最近一年使用:0次
3 . 已知公差不为
的等差数列
的前
项和为
,
,且
,
,
成等比数列.
(1)求数列
的通项公式;
(2)若数列
满足
,求数列
的前
项和
;
(3)若数列
满足
,
,求数列
的通项公式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.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/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc858b7a95c5006a44067022da09f667.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/960a88db0d1c31ace31b67adefda3137.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)
(3)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e42e1961482c32d10aa1b3ba12a6d0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bad9a56331233402a67793a96054de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
您最近一年使用:0次
4 . 设等差数列
的前
项和为
且
对任意
都成立.
(1)求数列
的通项公式;
(2)若
,求证: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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de80026ac2f1d322123d484ce051cd83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19926054f0fb8b150e312d1530a7a9b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10e468312d09c6563c9094b710a35a65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eadd42e1f5910bcf2080d46d60db4f91.png)
您最近一年使用:0次
名校
5 . 等差数列
,满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd19f20340437ad6237185e11f23e5f2.png)
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51ab128820f8db987e399ed426320684.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd19f20340437ad6237185e11f23e5f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90b2385a78ff551c3c13d1ce9e21b602.png)
A.n的最大值是50 | B.n的最小值是50 |
C.n的最大值是51 | D.n的最小值是51 |
您最近一年使用:0次
2020-09-09更新
|
360次组卷
|
6卷引用:2020届浙江省宁波市余姚中学高三下学期高考模拟数学试题
2020届浙江省宁波市余姚中学高三下学期高考模拟数学试题2019年浙江省舟山市定海区舟山中学三模数学试题上海市青浦区2019届高三二模数学试题(已下线)期中测试二(能力提升)-2020-2021学年高二数学单元测试定心卷(人教版必修5)(已下线)重难点突破02 函数的综合应用(九大题型)(已下线)专题06 函数与导数常见经典压轴小题归类(练习)-3
10-11高三·广东·阶段练习
名校
6 . 已知等差数列
的公差为-1,且
.
(1)求数列
的通项公式
与前n项和
;
(2)若将数列
的前4项抽去其中一项后,剩下三项按原来顺序恰为等比数列
的前3项,记
的前n项和为
.若对任意m,n∈
,都有
恒成立,求实数λ的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d28c990e85d87e43205472a0b0374b3.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(2)若将数列
![](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/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52866a74e4af867ceea0efb1ad06602c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f39dda82ddb90816e61b67fd52367fef.png)
您最近一年使用:0次
2020-01-07更新
|
278次组卷
|
15卷引用:2012届浙江省台州中学高三上学期期中考试文科数学试卷
(已下线)2012届浙江省台州中学高三上学期期中考试文科数学试卷浙江省绍兴市柯桥中学2019-2020学年高二下学期期中数学试题(已下线)2011届广东省执信中学中学高三2月月考数学文卷2015届湖北省武汉华中师大附中高三5月考试理科数学试卷2016届河北省衡水中学高三上学期四调理科数学试卷2015-2016学年江苏省泰州、靖江中学高一下期中数学试卷重庆市育才中学2014-2015学年高一下学期期中数学(文)试题(已下线)解密03 等差数列与等比数列(分层训练)-【高频考点解密】2021年新高考数学二轮复习讲义+分层训练(已下线)解密03 等差数列与等比数列(讲义)-【高频考点解密】2021年新高考数学二轮复习讲义+分层训练(已下线)专题03等差数列等比数列之测案(文科)第一篇 热点、难点突破篇-《2022年高考文科数学二轮复习讲练测》(全国课标版)(已下线)专题03等差数列等比数列之测案(理科)第一篇 热点、难点突破篇-《2022年高考理科数学二轮复习讲练测》(全国课标版)河南省三门峡市2022-2023学年高三上学期11月月考数学文科试题陕西省渭南市韩城市新蕾中学2021-2022学年高三上学期期中文科数学试题陕西省渭南市韩城市新蕾中学2021-2022学年高三上学期期中理科数学试题河南省三门峡市2022-2023学年高三上学期11月阶段性考试数学(理)试题
7 . 已知等差数列
中,
,
,则数列
的通项公式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
__________ ;![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbab10ff7372c14992bc68fca91c803e.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e36c72bc391615002aa33fd3676cb4f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a0d29f34218cd60cc6e9ce4dcd13925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbab10ff7372c14992bc68fca91c803e.png)
您最近一年使用:0次
2018-04-01更新
|
668次组卷
|
3卷引用:2017年普通高等学校招生全国统一考试(浙江卷)仿真预测卷(三)
8 . 等差数列
满足
,则
的取值范围是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7524ab69022c108ebf4dfe6c0822b7dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1ccd83b247c8666e5452bb530b12266.png)
您最近一年使用:0次
2017-07-21更新
|
657次组卷
|
2卷引用:浙江省9+1高中联盟2016-2017学年高一下学期期中联考数学试题
9 . 已知数列
为等差数列,
,
.
(Ⅰ)求数列
的通项公式
;
(Ⅱ)设
,数列
的前
项和为
.
(i)求
;
(ii)若
,
,
成等比数列,
,求正整数
,
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a0eecb5b800fce9ae10aed86ffee62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf49ed885c24e65486943408f2b8304.png)
(Ⅰ)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d005409790b3192705a181b2c8e7dfed.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)
(i)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
(ii)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e9a724b59c890095baa5cb73e267c44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7e74be91bfe4bc209da7539dbf9b72c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e34f42b3be15518c29e3689c9fe6d6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
10 . 设
为数列
的前
项和,若![](https://img.xkw.com/dksih/QBM/2015/1/7/1571956476215296/1571956482048000/STEM/78dc18d5061c4ffbb6176fc34b45059b.png?resizew=28)
是非零常数,则称该数列为“和等比数列”;若数列
是首项为
,公差不为0的等差数列,且数列
是“和等比数列”,则![](https://img.xkw.com/dksih/QBM/2015/1/7/1571956476215296/1571956482048000/STEM/99c9613bf4cc4c81b1d9a76252fd7cfd.png?resizew=91)
__________ .
![](https://img.xkw.com/dksih/QBM/2015/1/7/1571956476215296/1571956482048000/STEM/5a6c10f67912492fa8e9df720d1b308e.png?resizew=19)
![](https://img.xkw.com/dksih/QBM/2015/1/7/1571956476215296/1571956482048000/STEM/2c3dbb2c1676492f9424254da7098660.png?resizew=31)
![](https://img.xkw.com/dksih/QBM/2015/1/7/1571956476215296/1571956482048000/STEM/c00c207a9034465db92929cdcca58f71.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2015/1/7/1571956476215296/1571956482048000/STEM/78dc18d5061c4ffbb6176fc34b45059b.png?resizew=28)
![](https://img.xkw.com/dksih/QBM/2015/1/7/1571956476215296/1571956482048000/STEM/abd4fec0e66a447e93bef5602dc4aee8.png?resizew=59)
![](https://img.xkw.com/dksih/QBM/2015/1/7/1571956476215296/1571956482048000/STEM/2f916c7d2f7c4224abb78854b349ffb1.png?resizew=29)
![](https://img.xkw.com/dksih/QBM/2015/1/7/1571956476215296/1571956482048000/STEM/fab69954132542dc91dacad326f507b6.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2015/1/7/1571956476215296/1571956482048000/STEM/2f916c7d2f7c4224abb78854b349ffb1.png?resizew=29)
![](https://img.xkw.com/dksih/QBM/2015/1/7/1571956476215296/1571956482048000/STEM/99c9613bf4cc4c81b1d9a76252fd7cfd.png?resizew=91)
您最近一年使用:0次
2016-12-03更新
|
944次组卷
|
2卷引用:2015届浙江省嘉兴市桐乡一中高三新高考单科综合调研三理科数学试卷