1 . (已知数列{
}满足:
,
为数列
的前
项和.
(1) 若{
}是递增数列,且
成等差数列,求
的值;
(2) 若
,且{
}是递增数列,{
}是递减数列,求数列{
}的通项公式;
(3) 若
,对于给定的正整数
,是否存在一个满足条件的数列
,使得
,如果存在,给出一个满足条件的数列,如果不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ccf2efdc4a00a59442a8a6117414195.png)
![](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)
(1) 若{
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccadf5fe0d8a09ac97324ad2d9f60f69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
(2) 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f970f380a12c843bb4a74ff34a15b2ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e20d6d31d98713228480757c4efc8fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b07f7a46323e7630dd8cd5cffcb11a5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(3) 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194b8ab194c7d299d5c3e0f09ec18384.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b51aef70ba664f3361419721de7d255d.png)
您最近一年使用:0次
2016-12-03更新
|
670次组卷
|
3卷引用:上海市五校2017届高三上学期12月联考数学试题
2 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f168350df63ffad561fe335f8d4b805.png)
常数
)满足
.
(1)求出
的值,并就常数
的不同取值讨论函数
奇偶性;
(2)若
在区间
上单调递减,求
的最小值;
(3)在(2)的条件下,当
取最小值时,证明:
恰有一个零点
且存在递增的正整数数列
,使得
成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f168350df63ffad561fe335f8d4b805.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/057db09504e1a3e62cd7fc678a7c31ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6de99d710db8879ae5e252dd7a80dbba.png)
(1)求出
![](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/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b4fc6f2418a01a22e093134b432574.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(3)在(2)的条件下,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2ebbcccecea9155858e048ba3828602.png)
您最近一年使用:0次
2016-12-03更新
|
1128次组卷
|
4卷引用:2014届上海市虹口区高三5月模拟考试理科数学试卷
(已下线)2014届上海市虹口区高三5月模拟考试理科数学试卷上海市建平中学2015届高三下学期4月月考数学试题上海市普陀区长征中学2018-2019学年高三上学期期中数学试题上海市闵行区七宝中学2016-2017学年高三上学期期中数学试题
9-10高三·重庆·期中
名校
解题方法
3 . 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
4 . 设Sn是数列
的前n项和,定义等斜率数列
且
等式
恒成立.
(1)若
是首项为1,公比为3的等比数列,请判断
是否为等斜率数列,并说明理由;
(2)已知
是等斜率数列,证明:
是等差数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f0e0373a4e95709a67c312cdc054466.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d48bb696708fd77448c1427b6e769fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2d0c1a0bddea64281c61f2851b37634.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次
解题方法
5 . 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
11-12高二上·辽宁沈阳·阶段练习
6 . 设二次函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14a7ccdb3d866ab26ad602db6635884a.png)
,对任意实数
,有
恒成立;数列
满足
.
(1)求函数
的解析式;
(2)试写出一个区间
,使得当
时,
且数列
是递增数列,并说明理由;
(3)已知
,是否存在非零整数
,使得对任意
,都有
恒成立,若存在,求之;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14a7ccdb3d866ab26ad602db6635884a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2af7267fa641fe998666f090bac90f6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76c0bd88ad30e02ee640eab5152d7a31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cfb19f0c37a72b33083ae9319f11a74.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)试写出一个区间
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c52a2eb99e82145022e49f105fe731.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bf7b20a31978af413bd94b5d67038ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/211146f0a389a2f7d79f77e75c9dd01e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14835bf3f00139ccec0694d0924db795.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194e584a3d060df4f0cffd81650aaeb6.png)
您最近一年使用:0次
7 . 已知函数
,各项均不相等的有限项数列
的各项
满足
.令
,
且
,例如:
.
(Ⅰ)若
,数列
的前n项和为Sn,求S19的值;
(Ⅱ)试判断下列给出的三个命题的真假,并说明理由.
①存在数列
使得
;②如果数列
是等差数列,则
;
③如果数列
是等比数列,则
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b84661c468c1df5f538479adc94bb4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/983f7e1cd303dc3c2a69ec0aa022f41e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97ea8f47d8d8d9e1832d52b1c7425450.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60399797b236edd4688d980b702cbeb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c23df8592b503e012253990200d139c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f874a8de8edb3794b14000fdce563baf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ba2b0f9ac523f171dd24956f41bd4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d902f8881b35b4f310bd5c31ff76e83d.png)
(Ⅰ)若
![](https://img.xkw.com/dksih/QBM/2015/1/7/1571954537906176/1571954543755264/STEM/de7c9f9c14a648f9affb096ca9a60be0.png)
![](https://img.xkw.com/dksih/QBM/2015/1/7/1571954537906176/1571954543755264/STEM/e14b46b175f2488e93d66c5f219b02ac.png)
(Ⅱ)试判断下列给出的三个命题的真假,并说明理由.
①存在数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/983f7e1cd303dc3c2a69ec0aa022f41e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa8fcccbb1234ad67314c96f9856e240.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/983f7e1cd303dc3c2a69ec0aa022f41e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833664fa4ad14889c4fad783f03e5c16.png)
③如果数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/983f7e1cd303dc3c2a69ec0aa022f41e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833664fa4ad14889c4fad783f03e5c16.png)
您最近一年使用:0次
2016-12-03更新
|
829次组卷
|
2卷引用:2015届湖南省浏阳一中、攸县一中、醴陵一中高三12月联考理科数学试卷
10-11高三·江西·阶段练习
解题方法
8 . 定义![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0570307e5eda956442ae0eab4aab3fa.png)
(1)设函数
, 求函数
的最小值;
(2)设
,正项数列
满足:
,
,求数列
的通项公式,并求所有可能乘积
的和.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0570307e5eda956442ae0eab4aab3fa.png)
(1)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/729677f2aafe339d0e97cd876b2f2173.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38fcec7af3520884b173b29bda6c657a.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ea121b5b50d50e3e451884191342124.png)
![](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/74783bfb4444bd904488fc23cf1223fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/666c9595f8df6cd46bad019fbddfcedf.png)
您最近一年使用:0次
9 . 已知数列
中,
,其前
项和
满足
,令
.
(1)求数列
的通项公式;
(2)若
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2de079a76e0b7def9f379b23a446d62.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/cdef28abf3cbeae1b0ffceec7866f634.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d005409790b3192705a181b2c8e7dfed.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e37a2adb69dc49bb586de6477a1e36aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316f058f7844edfa784e4cbbe830c43f.png)
您最近一年使用:0次
名校
解题方法
10 . 已知数列
的前
项和为
,满足
与
的等差中项为
(
).
(1)求数列
的通项公式;
(2)是否存在正整数
,是不等式
(
)恒成立,若存在,求出
的最大值;若不存在,请说明理由.
(3)设
,
,若集合
恰有
个元素,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.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/ec5feaf77d0fecce25efb6c274000d9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f19f39beb2ca207137f0816d87332197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37a59558292ad6b3d0978bfd7484990.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)是否存在正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a758ea76e914eb4ce69da4916ccd7769.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37a59558292ad6b3d0978bfd7484990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2158e6be25de78e8d7c15e8843607c8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37a59558292ad6b3d0978bfd7484990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d24057a64130b9f47278219c3926888b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2017-12-20更新
|
546次组卷
|
4卷引用:河南省郑州市宇华实验学校2023-2024学年高二下学期5月月考数学试题
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