1 . 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上海市建平中学2015届高三下学期4月月考数学试题
名校
2 . 设数列
的前
项和为
,点
均在函数
的图象上.
(Ⅰ)求数列
的通项公式;
(Ⅱ)若
为等比数列,且
,求数列
的前n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/34cc5336744f35a0bbbac8b5f6b9b083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
(Ⅰ)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/108d31b93eb4b4b0a09683c0e8c53621.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b4cb856d6ac524c4c1c421e25d668ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2016-12-03更新
|
1199次组卷
|
2卷引用:2015届北京市石景山区高三3月统一测试(一模)文科数学试卷
3 . 如果有穷数列
,
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
满足条件:
,
,
,
即
,
我们称其为“对称数列”.例如:数列
和数列
都为“对称数列”.已知数列
是项数不超过
的“对称数列”,并使得
依次为该数列中连续的前
项,则数列
的前
项和
所有可能的取值的序号为
①![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d052ce4296b755bbb57bd93177705889.png)
②![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea642ddfd41cba5c0889dfba39f0b6b1.png)
③![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e704576fec8a5795b6847d5d68757851.png)
④![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9c4b10040cdf344331c2ef4a4bd2363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9fc82353331abee0828dee9b38c08f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd94aeeecf0123921d4aef51c5defcf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/341bd4ff68347b38c8e3f9e5a3b665dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/692f0652866d5e18fa597d40bfc3cac2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22fc26a14e8e5987688565881fb71e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cecc3d59296521ff4e1edc78a4ea67d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2165779a6796a859638e1edbfbcda31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6c42e1413830f2cafb59de0a8bf7fd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f435a4a4ecf15453a8f7a683cecd6241.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6315a20e3ecd1768ae381e2a87610bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e91081300bc89368da216c266a67031.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7b8edd8ae66f7e9e7b09461012a6c78.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d052ce4296b755bbb57bd93177705889.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea642ddfd41cba5c0889dfba39f0b6b1.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e704576fec8a5795b6847d5d68757851.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9c4b10040cdf344331c2ef4a4bd2363.png)
A.①②③ | B.②③④ | C.①②④ | D.①③④ |
您最近一年使用:0次
9-10高三·重庆·期中
名校
解题方法
4 . 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: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)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
5 . 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
6 . 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
名校
7 . 已知数列
的前
项和为
,且
对一切正整数
都成立,
(I)证明:数列
是等比数列,并求出数列
的通项公式;
(II)设
,求数列
的前
项和
.
![](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/e69610771b2ac9e18538a257df90c968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(I)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d17d72d1d20d385920c3d9da6bed8bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(II)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cf2bb9ffd8a6678e4a366d2416ff740.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5c583c98a1fd516c6ceaa60b55dec.png)
您最近一年使用:0次
2018-12-10更新
|
208次组卷
|
2卷引用:【校级联考】福建省闽侯二中五校教学联合体2017-2018学年高二上学期期中考试数学(文)试题
2014·上海闵行·三模
名校
8 . 已知
.
(1)当
,
时,若不等式
恒成立,求
的范围;
(2)试判断函数
在
内零点的个数,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8604edd7f2425f02f2940464413b58a.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc2d3df37e73a8abea815f37dbb3fff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f034f7c275de68eaef93012d1fa92d95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5759ff8292ae1a0c78e20edc33890c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)试判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f4c4985f8a820372f1349f21f8dc31.png)
您最近一年使用:0次
9 . 已知数列
满足
,
,其前
项和为
.
(1)当
与
满足什么关系时,对任意的
,数列
都满足
?
(2)对任意实数
,是否存在实数
与
,使得
与
是同一个等比数列?若存在,请求出
满足的条件;若不存在,请说明理由;
(3)当
时,若对任意的
,都有
,求实数
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/999ac8c1ef39251e07a7fc54cbf7e26e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69e61474fb5c8833ebc2db49e5001553.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/671652b1a945f94ac775f4ea035ae59c.png)
(2)对任意实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79d676582bf28b1096c6ec7cea3e08b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b66f2d8b3e1e6884316df2e5e79ae8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b51d8469cc3a855590c3e41cb2b8b25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cd5371a6f0f82c65dd22f75f8b807c1.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce107e7588983359442312e9e04a704f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e2992abafa64ba431276f936401de68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
解题方法
10 . 已知等差数列
中,
,前
项和为
且满足条件:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/238925337969e24f07793e41455f87f8.png)
(1)求数列
的通项公式;
(2)若数列
的前
项和为
有
,
,又
,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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/238925337969e24f07793e41455f87f8.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/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/0ea9ddb65d4d2601bd41c69730702b7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4995fa0403e013d888c0935ebfe15024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa0033642afe1efc11e1d2276c21d9df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
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