13-14高三下·上海虹口·阶段练习
名校
1 . 已知数列
和
满足:
,其中
为实数,
为正整数.
(1)对任意实数
,求证:
不成等比数列;
(2)试判断数列
是否为等比数列,并证明你的结论.
![](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/83d9ea28ccc8c24eeafa2ce1caf71b1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5fffd330dd6b9241659d790bd2a7fb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(1)对任意实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5fffd330dd6b9241659d790bd2a7fb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c14d9ae06f864498048d55088ff4e6.png)
(2)试判断数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
您最近一年使用:0次
2014·上海·二模
2 . 已知数列
中,
,对任意的
,
、
、
成等比数列,公比为
;
、
、
成等差数列,公差为
,且
.
(1)写出数列
的前四项;
(2)设
,求数列
的通项公式;
(3)求数列
的前
项和
.
![](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/31e36bff57bcfa86432b340e25e51d42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b7b6ecfdff9d2b29ef64d2a6f3343f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39773a450e3c30c72ead226d84e54563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/069c88b849f37a1597cb7e9cdcb1e755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9778f679a2495d92a52b36e5e86d4b31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39773a450e3c30c72ead226d84e54563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/069c88b849f37a1597cb7e9cdcb1e755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/952162dafce99cb22b05a1e313df53ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8904e7018ec79c8b0efdcb3ba67cb7cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ab9a15f8bde29fa4a987a2d0a6e4064.png)
(1)写出数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c05c0557cb0f74e02ca22b7c10c01d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dcb1ddb73e4087f8cfcc40eead8b893.png)
(3)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b419ba91fa5722d3c820095076615881.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63666ed9a7dfd5b578b43d513468acff.png)
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2014·上海·二模
名校
3 . 在数列
中,
,且对任意的
,
成等比数列,其公比为
.
(1)若
=2(
),求
;
(2)若对任意的
,
,
,
成等差数列,其公差为
,设
.
①求证:
成等差数列,并指出其公差;
②若
=2,试求数列
的前
项的和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d737c1047a14cee12a6671383e244fa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20c721c72295e218233274397d79ffb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e231eb58d43b2bbcc011e88df130cd95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9778f679a2495d92a52b36e5e86d4b31.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9778f679a2495d92a52b36e5e86d4b31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20c721c72295e218233274397d79ffb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85f20406818a94468206830df58923b5.png)
(2)若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20c721c72295e218233274397d79ffb3.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572664178180096/1572664183971840/STEM/c1615915fa064407b0efd7c916379c40.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572664178180096/1572664183971840/STEM/2a2abb2b532b415380aae00b10f23329.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572664178180096/1572664183971840/STEM/026aa5086aef400f9bb356975daeb20e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8904e7018ec79c8b0efdcb3ba67cb7cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/149c10e78e42a380bfd6bdf58a4d0708.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4793bac2f2fcdde242d852f2092175e9.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edf900c810371fb21297c15f86d8743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe9b2f3fb2ead558a60570c7c90aee3.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572664178180096/1572664183971840/STEM/1d2a9dc528f244a9b4b68ad45eaa7d44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63666ed9a7dfd5b578b43d513468acff.png)
您最近一年使用:0次
2016-12-02更新
|
1465次组卷
|
7卷引用:2014届上海市十三校高三年级第二次联考文科数学试卷
2014·上海·一模
解题方法
4 . 等差数列
和等比数列
中,
,
,
是
前
项和.
(1)若
,求实数
的值;
(2)是否存在正整数
,使得数列
的所有项都在数列
中?若存在,求出所有的
,若不存在,说明理由;
(3)是否存在正实数
,使得数列
中至少有三项在数列
中,但
中的项不都在数列
中?若存在,求出一个可能的
的值,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/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c5a7a17a394e868e0acd1803a9ab795.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fe8b3668a8c01835ce26100945097e3.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)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a975cb0983bd386bc9b56a4cd7b5a545.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)是否存在正整数
![](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/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(3)是否存在正实数
![](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/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
您最近一年使用:0次
2016-12-02更新
|
1638次组卷
|
6卷引用:2014届上海市高三八校联合调研考试理科数学试卷
(已下线)2014届上海市高三八校联合调研考试理科数学试卷(已下线)2014届上海市高三八校联合调研考试文科数学试卷【全国市级联考】上海市2018届高三5月高考模拟练习(三)数学试题上海市复旦大学附属中学浦东分校2019-2020学年高三下学期3月月考数学试题(已下线)热点09 计数原理-2021年高考数学【热点·重点·难点】专练(上海专用)(已下线)专题4.6 排列组合和二项式定理【压轴题型专项训练】-2020-2021学年高二数学下学期期末专项复习(沪教版)
14-15高三上·上海嘉定·期末
5 . 已知数列
满足
(
).
(1)若数列
是等差数列,求它的首项和公差;
(2)证明:数列
不可能是等比数列;
(3)若
,
(
),试求实数
和
的值,使得数列
为等比数列;并求此时数列
的通项公式.
![](https://img.xkw.com/dksih/QBM/2014/2/12/1571506649980928/1571506655297536/STEM/582c3183233740e28f58539988df1dbb.png?resizew=32)
![](https://img.xkw.com/dksih/QBM/2014/2/12/1571506649980928/1571506655297536/STEM/f5c45bd57c5e45ad8a95f80b578b0cdd.png?resizew=115)
![](https://img.xkw.com/dksih/QBM/2014/2/12/1571506649980928/1571506655297536/STEM/7267dcf94ea0481884b1939941791972.png?resizew=47)
(1)若数列
![](https://img.xkw.com/dksih/QBM/2014/2/12/1571506649980928/1571506655297536/STEM/582c3183233740e28f58539988df1dbb.png?resizew=32)
(2)证明:数列
![](https://img.xkw.com/dksih/QBM/2014/2/12/1571506649980928/1571506655297536/STEM/582c3183233740e28f58539988df1dbb.png?resizew=32)
(3)若
![](https://img.xkw.com/dksih/QBM/2014/2/12/1571506649980928/1571506655297536/STEM/b9b70788a7104b079a4a77dddf53d56b.png?resizew=52)
![](https://img.xkw.com/dksih/QBM/2014/2/12/1571506649980928/1571506655297536/STEM/79c14bdeef744ad5874e56fb948185c4.png?resizew=105)
![](https://img.xkw.com/dksih/QBM/2014/2/12/1571506649980928/1571506655297536/STEM/7267dcf94ea0481884b1939941791972.png?resizew=47)
![](https://img.xkw.com/dksih/QBM/2014/2/12/1571506649980928/1571506655297536/STEM/f48f799164fa49fca7dee2708e8ec9f9.png?resizew=14)
![](https://img.xkw.com/dksih/QBM/2014/2/12/1571506649980928/1571506655297536/STEM/7a892c80ce0b473f97764ae2aff9b536.png?resizew=14)
![](https://img.xkw.com/dksih/QBM/2014/2/12/1571506649980928/1571506655297536/STEM/57f20fdbcc2f462098c15bb9ff63fe23.png?resizew=31)
![](https://img.xkw.com/dksih/QBM/2014/2/12/1571506649980928/1571506655297536/STEM/582c3183233740e28f58539988df1dbb.png?resizew=32)
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真题
解题方法
6 . 设Sn表示数列
的前n项和.
(1)若
为等差数列, 推导Sn的计算公式;
(2)若
, 且对所有正整数n, 有
. 判断
是否为等比数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d737c1047a14cee12a6671383e244fa5.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d737c1047a14cee12a6671383e244fa5.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3e595bfb02adc744100c216aeec4240.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eac998bfa0094a8f5fdc441120851ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d737c1047a14cee12a6671383e244fa5.png)
您最近一年使用:0次
2016-12-03更新
|
2525次组卷
|
4卷引用:第4章数列【单元提升卷】-【满分全攻略】2022-2023学年高二数学下学期核心考点+重难点讲练与测试(沪教版2020选修一+选修二)
(已下线)第4章数列【单元提升卷】-【满分全攻略】2022-2023学年高二数学下学期核心考点+重难点讲练与测试(沪教版2020选修一+选修二)2013年普通高等学校招生全国统一考试文科数学(陕西卷)2015-2016学年广东省普宁市一中高二上期中文科数学试卷沪教版(2020) 选修第一册 同步跟踪练习 第4章 测试卷
真题
名校
7 . 在等差数列{an}中,a1+a3=8,且a4为a2和a9的等比中项,求数列{an}的首项,公差及前n项和.
您最近一年使用:0次
2016-12-02更新
|
3506次组卷
|
8卷引用:沪教版(上海) 高二第一学期 新高考辅导与训练 第7章 数列与数学归纳法 7.2(3)等差数列的前n项和
2013·上海黄浦·二模
8 . 已知数列
具有性质:①
为整数;②对于任意的正整数
,当
为偶数时,
;当
为奇数时,
.
(1)若
为偶数,且
成等差数列,求
的值;
(2)设
(
且
N),数列
的前
项和为
,求证:
;
(3)若
为正整数,求证:当
(
N)时,都有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcd4ac585f99d00780dbf53b60ccc5b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31f541210b1694538cbd23914175b048.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c14d9ae06f864498048d55088ff4e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bedcae8eadde28a80b38a475f04f3b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12b894738a0c1d7e580df8ad1161fe4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aae55952e90bddabd1205eeb66437c7a.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/f3404ae36fb3db0c6e794b4bbd743c26.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad156c9cc82c986bac29c4f03d454d62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5b0aafc603ba02b6702e785b00a5013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31bd42f8e3f220a7b1c6f6945e73bc10.png)
您最近一年使用:0次
9 . 已知{an}是公差不为零的等差数列,a1=1,且a1,a3,a9成等比数列.
(Ⅰ)求数列{an}的通项; (Ⅱ)求数列
的前n项和Sn.
(Ⅰ)求数列{an}的通项; (Ⅱ)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb007620a97b6b556e9b1f50abb9eb72.png)
您最近一年使用:0次
2016-11-30更新
|
909次组卷
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28卷引用:上海市华东师范大学第二附属中学2019-2020学年高一下学期期中数学试题
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真题
10 . 在数列
中,
,
,且
;
(1)设
,证明
是等比数列;(2)求数列
的通项公式;(3)若
是
与
的等差中项,求
的值,并证明:对任意的
,
是
与
的等差中项;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.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/9ac47ce938ba204c72f1d2826de98669.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc441038390bad40841db9c2cf9f33e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5da4cd81500bdb43118150dbdb1541e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc858b7a95c5006a44067022da09f667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d726666f99a5a41dd673a2330e377b17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45a9eb6adbdfe7cd690fcca74e70340b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d9d634b493bdeff5a692f4bea23d9b3.png)
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