2018高三下·全国·专题练习
名校
解题方法
1 . 已知等差数列
满足
,
,公比为正数的等比数列
满足
,
.
(1)求数列
,
的通项公式;
(2)设
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f883388e60eb4893b32c9cd46d0e6dee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1e78b949ff0bbe0afd81d89df57b15e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2448cf72af76b810310e4cfb9818e2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f4a9773040619a4a82f250e33324074.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6248283c4c9aece472f94d10e9ab78dd.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2448cf72af76b810310e4cfb9818e2e.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5763e64567cef4838203b4fd680acda5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4a426d8afd49a1ce1e8dddd2ea37498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb26cd1601fe7e76e1e2dc0b4909324a.png)
您最近一年使用:0次
2018-08-01更新
|
4513次组卷
|
13卷引用:【全国百强校】河南省南阳市第一中学2018届高三第十九次考试数学(理)试题
【全国百强校】河南省南阳市第一中学2018届高三第十九次考试数学(理)试题(已下线)2018年4月2018届高三第二次全国大联考(新课标Ⅰ卷)-文科数学(已下线)2018年9月30日《每日一题》一轮复习(理)-每周一测(已下线)2018年9月30日《每日一题》一轮复习(文)-每周一测(已下线)2018年10月7日 《每日一题》一轮复习【文】- 每周一测吉林省五地六市联盟2018-2019学年高一下学期期末考试数学试题(已下线)2019年9月29日 《每日一题》2020年高考文数一轮复习-每周一测(已下线)2019年9月29日 《每日一题》2020年高考理数一轮复习-每周一测辽宁省沈阳市铁路实验中学2019-2020学年高二上学期10月月考数学试题吉林省长春市“BEST合作体”2018-2019学年高一下学期期末数学试题湖南师大附中2019-2020学年高二上学期入学考试数学试题(已下线)【南昌新东方】江西省南昌十九中2020-2021学年高三上学期10月第一次月考数学(理)试题四川省德阳市广汉中学、绵竹中学2021-2022学年高一下学期联考理科数学试题
名校
2 . 设有四个数的数列
,前三个数构成一个等比数列,其和为
,后三个数构成一个等差数列,其和为15,且公差非零.对于任意固定的实数
,若满足条件的数列个数大于1,则
的取值范围为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec99c57bf7997bd93e1ed8f48d5af9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
2018-05-12更新
|
639次组卷
|
3卷引用:【全国市级联考】河南省郑州市2018届高三第三次质量预测数学文试题
3 . 已知三个数
,
,
成等比数列,其倒数重新排列后为递增的等比数列
的前三项,则能使不等式
成立的自然数
的最大值为 __________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/008e77135f850cd4beab452480a591d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83666674f1111c699d7c5f7b792e0285.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fbb9c306da912756c1292f5a9988d91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b27434fcec11af4ece701e3a39d65d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
解题方法
4 . 已知等差数列
的前3项分别为1,
,
,公比不为1的等比数列
的前3项分别为4,
,
.
(1)求数列
与
的通项公式;
(2)设
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/268bebee8d786afc197d2299260b87f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c7311dd27a91ef55ef4056c727cf4d5.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b747cae51e50378aae057f245c1f6f46.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/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
2017-12-21更新
|
1245次组卷
|
3卷引用:河南省2018届高三12月联考数学(理)试题
名校
解题方法
5 . 已知数列
是首项
的等比数列,且
是首项为
的等差数列,
.
(1)求数列
和
的通项公式;
(2)求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/786a5ffb1e99dd50d4441892a17a73b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78d2373095bfc62b387e50b5bb14d062.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7670c99ffe54a6eea27097ca51eed73b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
2017-12-14更新
|
1090次组卷
|
5卷引用:河南省豫南豫北2018届高三第二次联考联评文科数学试卷
解题方法
6 . 已知数列
满足
,
.记
,则数列
的前
项和![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ea7626e0f7ca52b1ee7006c15c5f209.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5302fe2ace5bf57e25468a383410013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f03814dd488ba0ef1ca58e4587fc62e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/147952d82ff1784624d9b28b92243fab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ea7626e0f7ca52b1ee7006c15c5f209.png)
您最近一年使用:0次
2017-12-06更新
|
1168次组卷
|
3卷引用:河南省中原名校(豫南九校)2018届高三上学期第四次质量考评(期中)数学(文)试题
7 . 已知公比不为1的等比数列
的前
项和为
,且
成等差数列,
则
![](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/b801581d4210dd6cee9b0d0399cc64e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2007e991d3adbe585e558873e46164c.png)
则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/614306cc3f34bdee4d5d885b79667645.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2017-10-27更新
|
1144次组卷
|
3卷引用:广雅中学、东华中学、河南名校2018届高三上学期第一次联考数学(文)试题
名校
8 . 已知各项均不为零的数列
的前
项和为
,且对任意
,满足
.
(1)求数列
的通项公式;
(2)设数列
满足
,数列
的前
项和为
,求证:
.
![](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/f1b7d53913c3f4471d62579825f96f29.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91631e5c01aa1cd2fe929ddd6420120c.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/fa9eb5df4493d73ef26425478f930f5c.png)
您最近一年使用:0次
2017-12-26更新
|
3390次组卷
|
4卷引用:河南省洛阳市2017-2018学年高三年级第一次统考数学理试题
2010·河南·一模
名校
9 . 已知函数
,数列
是公差为d的等差数列,
是公比为q
(
)的等比数列.若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68252fa8a25c267fc55cfcd1727998f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53607dee5af1a06667cd6232b0febcdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/978410a313354368684983fc03fbee67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cdfac4a41ea163108be83c2b63af66f.png)
(Ⅰ)求数列
,
的通项公式;
(Ⅱ)设数列
对任意自然数n均有
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1804c8cc2797e07d5a08f480ea0b69e7.png)
![](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/72930697ae9aec696e2925d2ea93b41c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68252fa8a25c267fc55cfcd1727998f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53607dee5af1a06667cd6232b0febcdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/978410a313354368684983fc03fbee67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cdfac4a41ea163108be83c2b63af66f.png)
(Ⅰ)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(Ⅱ)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edd11c351e601e800ee95e42bb8f43f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/330a90b55ebb8314745409bb260e6407.png)
您最近一年使用:0次
名校
10 . 设公差不为零的等差数列
的前
项和为
,且
成等比数列.
(1)求数列
的通项公式;
(2)设
,数列
的前
项和为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92128c6c226ce688bc160fb86854f2fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192a47ab17ed5c588efc6d161889820c.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3b061d3478c4ca323959ab233e20fe3.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/fc1f5d407c0e99344ed5f0f5926c5d22.png)
您最近一年使用:0次
2016-12-05更新
|
1148次组卷
|
6卷引用:河南省林州市第一中学2018届高三12月调研考试数学(文)试题
河南省林州市第一中学2018届高三12月调研考试数学(文)试题2017届江苏南通中学高三上期中数学(理)试卷(已下线)2017-2018学年第一学期期末复习备考之精准复习模拟题高三年级(文)人教版数学试题(B卷)江西省宜春市第九中学2018-2019学年高二下学期期中考试数学(文)试题福建省尤溪县2018-2019学年普通高中高三上学期半期数学(理)试题山东省济南市外国语学校2020-2021学年高二下学期5月月考数学试题