1 . 已知等比数列
的前n项和为
,且
,
,
成等差数列,
.
(1)求数列
的通项公式;
(2)若
,证明:数列
的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c7b50239b6eb380ca7b4f86c2dabfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ba43a00a6e133ad175bd4f27c546415.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6899bf9cadae2ccdb14cbc87d4f280ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50078901d9cd61c06102250d205f9487.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53938e712c9353f3c418c9403354a971.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9928e46511e601913619a427ded84a3.png)
您最近一年使用:0次
名校
解题方法
2 . 设
为数列
的前
项和,
.
(1)求数列
的通项公式;
(2)设
,证明:
.
![](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/eb4487d7daca378b322a42a8d04f341b.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3f770c2751f5f81c9b4419e4e99d1f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a051cd30dd080d1a1a22b46b6444ae9.png)
您最近一年使用:0次
2023-12-29更新
|
2420次组卷
|
8卷引用:河北省衡水市枣强中学2024届高三上学期期末考试数学试题
河北省衡水市枣强中学2024届高三上学期期末考试数学试题河北省衡水市深州中学2024届高三上学期期末考试数学试题河北省金科大联考2024届高三上学期12月月考数学试题福建省百校联考2024届高三上学期12月月考数学试题山东省德州市第一中学2024届高三上学期期末数学试题江西省宜春市宜丰中学2024届高三上学期期末数学试题(已下线)考点12 数列中的不等关系 2024届高考数学考点总动员(已下线)重难点5-2 数列前n项和的求法(8题型+满分技巧+限时检测)
名校
解题方法
3 . 已如等差数列
的前
项和为
,若
,
.
(1)求
的通项公式;
(2)若数列
的前
项和
,求数列
的前
项和.
![](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/36ba808c24aeae6a2f34b98ae5ec04ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/477b15bed35216bc57a10de1676ddc3e.png)
(1)求
![](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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b89ebc4520a16bdf928373cc8ac93e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b52c9237cb0b4acc568d4afb12997186.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
2023-12-28更新
|
667次组卷
|
3卷引用:河北省保定市部分重点高中2024届高三上学期12月期末数学试题
4 . 已知数列
的前
项和为
.
(1)求
;
(2)求
.
![](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/04110cc8d173e6653a0682cac2e54cee.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bbccffa3466f8cbda8d85bdef1811d3.png)
您最近一年使用:0次
2023-10-04更新
|
2969次组卷
|
7卷引用:河北省衡水市武强中学2024届高三上学期期末数学试题
解题方法
5 . 已知数列
中,
,
,前
项和为
,若
.
(1)求数列
的通项公式;
(2)若数列
的前
项和为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fc336b4a83bf6d66c4afcc431597f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9645bd4d2002993b90ec6d48f9c04f7.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/ddcc797010923ddc32b2c63a2342ec85.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/ba57c83d526ac308d1461e80fcca9f36.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/2abb00273bdbc6c7799debfd04135a00.png)
您最近一年使用:0次
6 . 已知函数
,
在
上可导,若
,则
成立.英国数学家泰勒发现了一个恒等式:
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2bf72dbd91a4126b2f1fdbdb578f94a.png)
________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9587df831df1af5e7dd6be5fdc7bd8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acff9b73023e4f2e3e1fb3a505491b05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f34f372b15c35be38485a90fdf3d95ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2bf72dbd91a4126b2f1fdbdb578f94a.png)
您最近一年使用:0次
2023-08-20更新
|
632次组卷
|
5卷引用:河北省唐山市路北区2024届高三上学期期末模拟数学试题
河北省唐山市路北区2024届高三上学期期末模拟数学试题山东省东营市2022-2023学年高二下学期期末数学试题上海市格致中学2024届高三上学期开学考试数学试题(已下线)第十章 导数与数学文化 微点2 导数与数学文化(二)【人教A版(2019)】专题03数列-高二下学期名校期末好题汇编
7 . 已知数列
的前
项和为
,且
,
.
(1)证明:
为等比数列;
(2)若
,求
.
![](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/4afcba984f31d2d1f1d1eacfba6c735b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dea1dd4ffcb4cf0697ca43079f6a1f2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41b8f88627b97ea3e58be2bf6a2b5e26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/524824d2cc64eeb9e9e267fc56a1fc94.png)
您最近一年使用:0次
8 . 已知等差数列
的前
项和为
,
(1)求数列
的通项公式;
(2)若
,求数列
的前
项和.
![](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/02540cd94e33eb91e922fda7867a28de.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/216876de04325fd250c38c485cbc34b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e946baf1316ac1f219398ecedadf6cf.png)
您最近一年使用:0次
2023-04-15更新
|
1104次组卷
|
7卷引用:河北省保定市高碑店市崇德实验中学2022-2023学年高二下学期期末数学试题
名校
解题方法
9 . 已知数列
各项都不为0,
,
,
的前
项和为
,且满足
.
(1)求
的通项公式;
(2)若
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18d8e8f821111de8075e5c3dfb22a5d6.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/bb8f74de1219ec67154afefa672ad840.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a384c951e881fc3452219f4b9c3726ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f3ec2380ad15903d129a955a612948b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2023-03-13更新
|
3082次组卷
|
8卷引用:河北省唐山市邯郸市等2地2023届高三上学期期末数学试题
河北省唐山市邯郸市等2地2023届高三上学期期末数学试题河北省邢台市第一中学2022-2023学年高二下学期第一次月考数学试题湖南师范大学附属中学2023届高三下学期月考(七)数学试题(已下线)模块六 专题5 全真拔高模拟1山东省青岛市第五十八中学2024届高三上学期期末数学试题(已下线)专题04 数列(5)(已下线)数列 求和专题04数列求和(裂项求和)
解题方法
10 . 已知等差数列
满足
.
(1)求数列
的通项公式;
(2)设
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f898931c9e64c6abdecc12baba13a21c.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/216876de04325fd250c38c485cbc34b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/733c393eb55f776b8383277cc946e200.png)
您最近一年使用:0次