1 . 如图,过四棱柱
形木块上底面内的一点
和下底面的对角线
将木块锯开,得到截面
.
![](https://img.xkw.com/dksih/QBM/2015/3/25/1572028629540864/1572028634865664/STEM/dd9dbe86d37b43f2bdebde0c64dd03ad.png)
(1)请在木块的上表面作出过
的锯线
,并说明理由;
(2)若该四棱柱的底面为菱形,四边形时矩形
,试证明:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8456cee87c4e22351affc28f3a73a0f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f84f169e50dc59d4f7a8e1e36f5c847.png)
![](https://img.xkw.com/dksih/QBM/2015/3/25/1572028629540864/1572028634865664/STEM/dd9dbe86d37b43f2bdebde0c64dd03ad.png)
(1)请在木块的上表面作出过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(2)若该四棱柱的底面为菱形,四边形时矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b4cd2b33bd983a9ed6575b9de04a46a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5fd1eec835573c86bd65132d60559f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b91e7f678c9faf62db7243412e9c6daf.png)
您最近一年使用:0次
2016-12-03更新
|
613次组卷
|
3卷引用:2015届江苏省滨海中学高三下学期第一次月考数学试卷
11-12高二上·江苏·阶段练习
2 . 已知
,函数
.
(1)当
时,求
的单调区间;
(2)若
,试证明:“方程
有唯一解”的充要条件是“
”.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd037cec87ff3f7cefcde02a9411a7a.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f95455bb3c0507c8f0149590a3482780.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200f24e682c93e02a87f3f9d57dc5d40.png)
您最近一年使用:0次
3 . 在如图所示的四棱锥
中,
底面
,
为线段
上的一个动点.
![](https://img.xkw.com/dksih/QBM/2016/12/12/1579118396211200/1579118397186048/STEM/d1966cba6c9e4dd3a95b4530b93da0ff.png)
(1)证明 :
和
不可能垂直;
(2)当点
为线段
的三等分点(靠近
)时,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5aa0d36da718de7c50a781b8e2bb8e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/198b300533b4d6cc3d5b76a9b9133a11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58079f6165b3db9bab7a575c3ede3cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b5e290c6b2c5508a3bf6117afbf7e1.png)
![](https://img.xkw.com/dksih/QBM/2016/12/12/1579118396211200/1579118397186048/STEM/d1966cba6c9e4dd3a95b4530b93da0ff.png)
(1)证明 :
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b5e290c6b2c5508a3bf6117afbf7e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5944d850a29b986b4382d8e8e0de1575.png)
您最近一年使用:0次
2016-12-13更新
|
1318次组卷
|
3卷引用:江苏省泰兴中学2016-2017学年高三12月阶段性检测数学试题
4 . 正项数列
的前n项和Sn满足:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/806a9750801f80c9a6832b6a8f22d318.png)
(1)求数列
的通项公式
;
(2)令
,数列{bn}的前n项和为Tn,证明:对于任意的n∈N*,都有Tn<
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/806a9750801f80c9a6832b6a8f22d318.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf2d6fd3f1811e95dab7db1311b8e3dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3db9685af73cd5f3f2922c6237a4093.png)
您最近一年使用:0次
2016-12-12更新
|
12524次组卷
|
31卷引用:江苏省南通市如皋市2022-2023学年高三上学期9月诊断测试数学试题
(已下线)江苏省南通市如皋市2022-2023学年高三上学期9月诊断测试数学试题(已下线)江苏省南通市如皋市2022-2023学年高三上学期教学质量调研(一) 数学模拟试题(已下线)2014年高考数学(文)二轮复习专题提升训练江苏专用10练习卷2016届海南师大附中高三第九次月考理科数学试卷云南省玉溪市玉溪一中2017-2018学年高一下学期4月月考数学试题河南省郑州市第一中学2019-2020学年高二上学期第2次测试数学试题天津市静海一中2019-2020学年高三第二学期月考(3月)数学试题江西省新余市第一中学2019-2020学年高一3月零班网上摸底考试数学试题江苏省南京市田家炳高级中学2020-2021学年高三上学期期中数学试题江西省九江市都昌县第二中学2020-2021学年高二上学期第一次月考数学试题湖南省湘潭市第一中学2022届高三下学期3月月考数学试题江苏省南通市如皋市2022-2023学年高三上学期期初模拟数学试题广东省广州市天河中学2023-2024学年高三11月阶段性检测数学试题(已下线)2014年高考数学(理)二轮复习专题提升训练训练10练习卷(已下线)2014届高考数学总复习考点引领+技巧点拨第五章第6课时练习卷2013年普通高等学校招生全国统一考试理科数学(江西卷)2015-2016学年广东实验中学等高二下期末理科数学试卷2018届高三数学训练题(39):数列的前n项和 【全国百强校】宁夏银川一中2017-2018学年高二下学期期末考试数学(文)试题湖南省长沙市长郡中学2017-2018学年高一下学期期末数学试题(已下线)基础套餐练01-【新题型】2020年新高考数学多选题与热点解答题组合练2020届浙江省嘉兴市桐乡市高级中学高三下学期3月模拟测试数学试题2020届山东省青岛市第五十八中高三一模模拟考试数学试题云南省昆明市官渡区第一中学2019-2020学年高二下学期期中考试数学(理)试题(已下线)专题04 数列求和(知识串讲)-2020-2021学年高二数学重难点手册(数列篇,人教A版2019选择性必修第二册)(已下线)专题6-2 数列求和15种类型归纳-2022年高考数学毕业班二轮热点题型归纳与变式演练(全国通用)(已下线)第19节 数列求和(已下线)专题6-2 数列求和归类-1天津市咸水沽第一中学2021届高三下学期模拟检测(四)数学试题山东省威海乳山市第一中学2022-2023学年高二下学期开学考试数学试题安徽省合肥市第七中学2022-2023学年高二下学期期中检测数学试题
5 . 在正四面体
中,点
在
上,点
在
上,且
.
![](https://img.xkw.com/dksih/QBM/2015/12/29/1572405013897216/1572405019688960/STEM/f727812b9dc640c392a48d4a1cebdeed.png)
证明:(1)
平面
;
(2)直线
直线
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34b0c4c783dd55685bd3e88bb31c6696.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2391c0e2fc44598610d519dacb778062.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a44be92f38e063a01b8cd67418815cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ebbd866e455cf80ea669c9f56f792c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b693717f525facc79b9a500ed998b109.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b18f83063eb40652fe2542ee23b260e8.png)
![](https://img.xkw.com/dksih/QBM/2015/12/29/1572405013897216/1572405019688960/STEM/f727812b9dc640c392a48d4a1cebdeed.png)
证明:(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b15ff17f7c4e9ba8471adc8126b2d092.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6acb7a56f3631b1217e8c53d6d583bf3.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/415978ea31a224b425a665fc8d307c1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66a19c5a6b41b659a222d98639f72409.png)
您最近一年使用:0次
13-14高二下·江苏扬州·阶段练习
6 . 定义在
上的奇函数
满足
,且当
,
时,有
.
(1)试问函数
的图象上是否存在两个不同的点A,B,使直线AB恰好与y轴垂直,若存在,求出A,B两点的坐标;若不存在,请说明理由并加以证明.
(2)若
对所有
,
恒成立,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d188ec2580e273ce87e51653a2177ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6855784817151468771f29c0fc38fc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e998c8b6beba7850fbb881677e2f578d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abb1510002590df6388353fecef472a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d01645cf54dd71aa3d55f8f40c9bdaf.png)
(1)试问函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d4562dac1dd60eba4b86d1c9e17820.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1591d4244dcf5539a4ae98f554e91e61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec25b9d7ca47b780a744c2ebbf31d925.png)
您最近一年使用:0次
7 . 已知各项均为正数的数列
的前
项和为
,数列
的前
项和为
,且
.
⑴证明:数列
是等比数列,并写出通项公式;
⑵若
对
恒成立,求
的最小值;
⑶若
成等差数列,求正整数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.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/8a7118a8dab6f8e5346ebc3788cea66e.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/dfa3699086b3e4e9d296c424e53dd4b9.png)
⑴证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
⑵若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/228c22f7ca5a726f078ad1e51167a4a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851c8763f6700bccac95949fc0d316f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5fffd330dd6b9241659d790bd2a7fb2.png)
⑶若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28c787124f44a127c688baa78fb08c91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
您最近一年使用:0次
11-12高三上·江苏宿迁·阶段练习
解题方法
8 . 已知函数
的图象如图所示,数列
的前
项的和
,
为数列
的前
项的和,且
.
![](https://img.xkw.com/dksih/QBM/2011/12/16/1570617845858304/1570617851240448/STEM/356b079a-331e-407e-ad0b-c7d063e688b5.png?resizew=120)
(1)求数列
、
的通项公式;
(2)找出所有满足:
的自然数
的值(不必证明);
(3)若不等式
对于任意的
,
恒成立,求实数
的最小值,并求出此时相应的
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6eaf5c0819b87137e964f38eb06b7a3.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/337f72b7719cda54385519b340448b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.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/24cebb76f3afe6e1e9e9de79e47d9b61.png)
![](https://img.xkw.com/dksih/QBM/2011/12/16/1570617845858304/1570617851240448/STEM/356b079a-331e-407e-ad0b-c7d063e688b5.png?resizew=120)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)找出所有满足:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43d647b83e813129b1ca0436d0aff008.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(3)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/526c25557840010fafcf8d8d6f177ace.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
解题方法
9 . 已知等比数列
的首项
,公比
,数列
前
项和记为
,前
项积记为
.
(1)证明:
;
(2)求
为何值时,
取得最大值;
(3)证明:若数列
中的任意相邻三项按从小到大排列,则总可以使其成等差数列;若所有这些等差数列的公差按从大到小的顺序依次记为
、
、
、
,则数列
为等比数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0a7a93f2c8c3527c9f9ccb55ee5d7ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb08ac8920645c616053c845978bdf1.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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63128fc7a6b65457980de79855180df6.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
(3)证明:若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edf900c810371fb21297c15f86d8743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31ac1def558351e2e3ed1235c570530.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82e260b088f071983f254ce8f5163fcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b783cf91e34e692ce8e171f0965cb53f.png)
您最近一年使用:0次
解题方法
10 . 已知函数
,函数
,函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/608da5b8b969a1824732444e1bffe28e.png)
(1)当函数
在
时为减函数,求a的范围;
(2)若a=e(e为自然对数的底数);
①求函数g(x)的单调区间;
②证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44631a5498ac443217d8f00a5efab7a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f3b0de07ca24df1fcd0a4c49ccc91f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/608da5b8b969a1824732444e1bffe28e.png)
(1)当函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dafea184dce8d6fdcf0297f7fd9d7444.png)
(2)若a=e(e为自然对数的底数);
①求函数g(x)的单调区间;
②证明:
![](https://img.xkw.com/dksih/QBM/2015/6/25/1572146522185728/1572146528198656/STEM/9958286643ea4471a7fdb5a5a1f7f355.png)
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4卷引用:江苏省合作联盟学校2019-2020学年高三下学期阶段性调研测试数学试题
江苏省合作联盟学校2019-2020学年高三下学期阶段性调研测试数学试题2015届江苏高考南通密卷六数学试卷2020届江苏省合作联盟学校高三下学期4月模拟数学试题(已下线)预测02 函数与导数-【临门一脚】2020年高考数学三轮冲刺过关(江苏专用)