1 . 将向量
组成的系列称为向量列
,并定义向量列
的前
项和
.若
,则下列说法中一定正确的是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6ca207442afb4248057a3d487aad5cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c15383d0da814f57f7c33c8f9f92a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c15383d0da814f57f7c33c8f9f92a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e61d53921ad115a679e467777c054bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a93ea981253b56d5c59e28b8a523877.png)
A.![]() | B.不存在![]() ![]() |
C.对![]() ![]() ![]() | D.以上说法都不对 |
您最近一年使用:0次
2017-12-07更新
|
1124次组卷
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7卷引用:安徽省巢湖市柘皋中学2018届高三上学期第三次月考数学(理)试题
安徽省巢湖市柘皋中学2018届高三上学期第三次月考数学(理)试题(已下线)4.2求数列的通项公式与前n项的和[理]-《备战2020年高考精选考点专项突破题集》(已下线)4.2求数列的通项公式与前n项的和[文] -《备战2020年高考精选考点专项突破题集》人教A版(2019) 选修第二册 突围者 第四章 易错疑难集训(三)苏教版(2019) 选修第一册 突围者 第4章 易错疑难集训三人教B版(2019) 选修第三册 突围者 第五章 第五章 易错疑难集训(三)北师大版(2019) 选修第二册 突围者 第一章 数列 易错疑难集训(三)
2 . 已知数列1,1,1,2,2,1,2,4,3,1,2,4,8,4,1,2,4,8,16,5,…,其中第一项是
,第二项是1,接着两项为
,
,接着下一项是2,接着三项是
,
,
,接着下一项是3,依此类推.记该数列的前
项和为
,则满足
的最小的正整数
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71c187044e689bbe78aededb6b48f877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71c187044e689bbe78aededb6b48f877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78697a69758b8d469a74236859514a72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71c187044e689bbe78aededb6b48f877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78697a69758b8d469a74236859514a72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ad4668cc927e277289b2af718f0d91.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/8d536cf2cdf8acc0be66029d3a002c58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
A.65 | B.67 | C.75 | D.77 |
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2019-11-10更新
|
521次组卷
|
2卷引用:安徽省亳州市涡阳县第一中学2019-2020学年高二12月月考数学(理)试题
3 . 已知数列
中,
, 且
.
(1)求
的值及数列
的通项公式;
(2)令
, 数列
的前
项和为
, 试比较
与
的大小;
(3)令
, 数列
的前
项和为
, 求证: 对任意
, 都有
.
![](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/818e36b738a180beb9cf8b2e870fd055.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe61d313eeca8ba47478a9de40540db8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe606934e77801ba256a5247867afa42.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/c43cd093a4db7ccca329d945748dc2c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(3)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08340f29de343c2b881284c8d2df3766.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/820b9615d8125e1a4655c9b41ab23894.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/46c39b984e70553acb2da1012e26ba36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c3fec47d2dd2b8099d86c87b6e57de8.png)
您最近一年使用:0次
名校
解题方法
4 . 已知数列{an}的前n项和Sn满足Sn=2an-n.
(1)求数列{an}的通项公式;
(2)设
,记数列{bn}的前n项和为Tn,证明:
(1)求数列{an}的通项公式;
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3c9dc190d0856e27a1cc225f766808e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc35cadd404e73a7c95cc49d417139cf.png)
您最近一年使用:0次
2016-12-04更新
|
916次组卷
|
4卷引用:安徽省六安市舒城中学2019-2020学年高二下学期第三次月考数学(理)试题
名校
5 . 已知各项均为正数的数列
满足
,且
,其中
.
(1)求数列
的通项公式;
(2)设
,数列
的前
项之和为
,对任意的
,总有
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/117abf5e481bd8de24c42f2f68abb9ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c597a4548ff7be671666bed67edc7e98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77bc5ce1b00bd6c17064b581e827798d.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/179e0b3a52e61d46e6ac16c4346037cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2448cf72af76b810310e4cfb9818e2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a34fcdc006a3bd6b19862b3ed7a7b992.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77bc5ce1b00bd6c17064b581e827798d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a34fcdc006a3bd6b19862b3ed7a7b992.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2017-11-27更新
|
602次组卷
|
3卷引用:安徽省阜阳市太和中学2017-2018学年高二上学期期中考试数学(理)试题
12-13高三上·安徽安庆·阶段练习
真题
解题方法
6 . 已知
是定义在
上的不恒为零的函数,且对于任意的
,
都满足:
.
(1)求
,
的值;
(2)判断
的奇偶性,并证明你的结论;
(3)若
,
(
),求
的前
项的和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dd0914dc4d4c7f75710ff460a286fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3b69d9577de4ee7c342dda447fa7bc8.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e38fffbc7ab9882480f4faa72390e23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ce6155e181e21ce56ea658b70f8af17.png)
(2)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/896df31f80127adbae738b3a014bd4e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8c7868f798eced7c48e5186761bfc59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96a55e4115c36490a40f83d15f066bd8.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
7 . 用
表示自然数
的所有因数中最大的那个奇数,例如:
的因数有
,则
;
的因数有
,则
,记数列
的前
项和为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6250cb361e367561e3f604de720ca4cc.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d02ea8c4988c5c28ab93f0d70fb55a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/412c73872a41744bb74eebfba048d664.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09294192b406961e5abc748583b3b7a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/244cf53f0fcf787c289d0bd22aae75fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb00f94610071540256bd796742a3295.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/6250cb361e367561e3f604de720ca4cc.png)
您最近一年使用:0次
9-10高三·重庆·期中
名校
解题方法
8 . 设数列
的前
项和为
,对任意的正整数
,都有
成立,记
(
),
(1)求数列
的通项公式;
(2)记
(
),设数列
的前
和为
,求证:对任意正整数
,都有
.
![](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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7b3ec1726461d5ad9c7e19004dff67c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e279470de7f4cf3e35cdefcf006bb76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1933b7c3ace69622339353431c519b13.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ee77bfceb2d1e15120ba31621f9c86a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1933b7c3ace69622339353431c519b13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ef8539a7a09303a95b4e79fb9949fc.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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6828a1cf75f19bb74a0e0490bd65c168.png)
您最近一年使用:0次
2016-11-30更新
|
784次组卷
|
5卷引用:2016届安徽省六安市一中高三上学期第四次月考理科数学试卷
2016届安徽省六安市一中高三上学期第四次月考理科数学试卷(已下线)2011届重庆市西南师大附中高三期中考试理科数学卷(已下线)2010-2011学年湖南省师大附中高一下学期期末考试(数学)(已下线)2013-2014学年广东省汕头市金山中学高一下学期期末考试数学试卷福建省厦门六中2018-2019学年高二上学期期中考试数学(文科)试题
解题方法
9 . 已知
,
,
,则函数
,
的各极大值之和为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28e6e694a57dbe2bd441a7b85ba31414.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd92edb1737107b8b5c75a0f17cd1cf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9d0e1d459420ca465ba19df3099519e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86f91a00d8ebdc69d1b456a26ab0b3a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dacc77cc8110cc0dfb639f7ffdd9fc4f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
10 . 已知等差数列
的公差为
,首项为正数,将数列
的前
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,
(1)求数列
的通项公式
与前
项和
;
(2)是否存在三个不等正整数
,使
成等差数列且
成等比数列.
![](https://img.xkw.com/dksih/QBM/2015/3/12/1571998440390656/1571998446460928/STEM/e746c5a6cad54347acb68451cc8965ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccf1f029bb36d7d199ed2b782490c424.png)
![](https://img.xkw.com/dksih/QBM/2015/3/12/1571998440390656/1571998446460928/STEM/e746c5a6cad54347acb68451cc8965ce.png)
![](https://img.xkw.com/dksih/QBM/2015/3/12/1571998440390656/1571998446460928/STEM/050cb6cc3d684509850612b0533a85b1.png)
![](https://img.xkw.com/dksih/QBM/2015/3/12/1571998440390656/1571998446460928/STEM/200596294c514e4483bc4f290a85d728.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://img.xkw.com/dksih/QBM/2015/3/12/1571998440390656/1571998446460928/STEM/934a686fc65944cf9eafc4320d006f73.png)
![](https://img.xkw.com/dksih/QBM/2015/3/12/1571998440390656/1571998446460928/STEM/646d0dff507247ea90f8ba298224e5b6.png)
![](https://img.xkw.com/dksih/QBM/2015/3/12/1571998440390656/1571998446460928/STEM/bc41dee891c94669bedb38e894b1556c.png)
(2)是否存在三个不等正整数
![](https://img.xkw.com/dksih/QBM/2015/3/12/1571998440390656/1571998446460928/STEM/848524c2753748ffa14c2e68b9814831.png)
![](https://img.xkw.com/dksih/QBM/2015/3/12/1571998440390656/1571998446460928/STEM/848524c2753748ffa14c2e68b9814831.png)
![](https://img.xkw.com/dksih/QBM/2015/3/12/1571998440390656/1571998446460928/STEM/7ab2a286b03442519005e4a617c30e78.png)
您最近一年使用:0次