1 . 若数列
满足:存在等差数列
,使得集合
元素的个数为不大于
,则称数列
具有
性质.
(1)已知数列
满足
,
.求证:数列
是等差数列,且数列
有
性质;
(2)若数列
有
性质,数列
有
性质,证明:数列
有
性质;
(3)记
为数列
的前n项和,若数列
具有
性质,是否存在
,使得数列
具有
性质?说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48dfe427f8841f24337b83a767750352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db5b653a209622a9136a15c3b11b0a4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e87e0860e3f142e7ddd7b45c16b211fa.png)
(1)已知数列
![](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/f24ba3195cbf220d03a1ef5bfe954f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fde3c47074b6f1b16af81c3684d04419.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e196cf353f8f832f24be4951a9fefab8.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35d16238329f13aeeb2d13aaf025ba07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662422cae5190af5fa05475a1e16f2d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5344eadd4711db34e3f935aedd5fb270.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b211310c6b436c4b7c4f38ce483d9b13.png)
(3)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/763b41172fa5f9f9ef85ab59df78bc39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de777c4e44546bcfe26ad5b6bb418052.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e87e0860e3f142e7ddd7b45c16b211fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f6b18b109a656b62fb173680ae99ca7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/763b41172fa5f9f9ef85ab59df78bc39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b7006e157c36d567488d1c30936700.png)
您最近一年使用:0次
2024-04-10更新
|
446次组卷
|
3卷引用:辽宁省沈阳市第一二〇中学2023-2024学年高三第十次质量监测(最后一卷)数学试题
2 . 已知:平面内的动点P到定点为
和定直线
距离之比为
,
(1)求动点P的轨迹曲线C的方程;
(2)若直线
与曲线C的交点为M,N,点
,
当满足 a 时,求证: b .
①
;
②
;
③直线
过定点,并求定点的坐标.
④直线
的斜率是定值,并求出定值.
请在①②里选择一个填在a处,在③④里选择一个填在b处,构成一个真命题,在答题卡上陈述你的命题,并证明你的命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ba2238d6afe0187534155dd9ac48c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(1)求动点P的轨迹曲线C的方程;
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fc5bd66dd6d5e09ff0893a938aed56e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/315a24a74c99dfa18e6d8b1b5220724b.png)
当满足 a 时,求证: b .
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/123a37d2688c0db395c86167f7fb9a52.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4808dca4874ae8142a91ce5605f9d7b.png)
③直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
④直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
请在①②里选择一个填在a处,在③④里选择一个填在b处,构成一个真命题,在答题卡上陈述你的命题,并证明你的命题
您最近一年使用:0次
3 . 已知椭圆C:
(a>b>0)的离心率
,短轴长为
.如图,椭圆左顶点为A,过原点O的直线(与坐标轴不重合)与椭圆C交于P,Q两点,直线PA,QA分别与y轴交于M,N两点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/d5a3a07e-06c3-477b-b0ba-bbbdf9324e87.png?resizew=183)
(1)求证:
为定值;
(2)试问以MN为直径的圆是否经过定点?请证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/075ba8c6fb5ef7288cd3fed425c8e69e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/d5a3a07e-06c3-477b-b0ba-bbbdf9324e87.png?resizew=183)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c828c44a61d2eca627dd4fd96f3cedb6.png)
(2)试问以MN为直径的圆是否经过定点?请证明你的结论.
您最近一年使用:0次
2022-12-26更新
|
722次组卷
|
2卷引用:辽宁省沈阳市第二中学2022-2023学年高三上学期期末数学试题
解题方法
4 . 如图,在四棱锥
中,侧棱
平面
,底面四边形
是矩形,
,点
、
分别为棱
、
的中点,点
在棱
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/17/feb0307f-0b41-42a8-8cf5-9a37f9538ba6.png?resizew=175)
(1)若
,求证:直线
平面
;
(2)若
,从下面①②两个条件中选取一个作为已知,证明另外一个成立.
①平面
与平面
的交线为直线
,
与直线
成角的余弦值为
;
②二面角
的余弦值为
.
注:若选择不同的组合分别作答,则按第一个解答计分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5164a3cc47e266446d49127e2ef10c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/888d60eea4792374fda946b0a7b2831c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/17/feb0307f-0b41-42a8-8cf5-9a37f9538ba6.png?resizew=175)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f10d00f6d7d9019f8b964bd4e19d629a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/982d01f052709b72afeaf1015fc7acc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/149596fee6ed1e2d19fd8dadc14a8baf.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
①平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9868f77d5ab5073b6145f1c6d272122e.png)
②二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42f1b90a3031fcd75754365a32b65a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64f1145c162038df3c7184d9201c628e.png)
注:若选择不同的组合分别作答,则按第一个解答计分.
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名校
解题方法
5 . 选用恰当的方法证明下列不等式
(1)证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/679e658fa5679ce73e1b5fdfe434b724.png)
(2)已知
,证明:
.
(3)已知a,b,c均为正实数,求证:若
,则
.
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/679e658fa5679ce73e1b5fdfe434b724.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73254f32b6da29ecc32df2e9f87a4c97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fa4f85f4d4f4bd9edaa8a964565ca1a.png)
(3)已知a,b,c均为正实数,求证:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a57e060f61f7efa54982bda67db483a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22d54c9eb01acfe09c34cb808326cc5e.png)
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6 . 已知函数
,设曲线
在点
处的切线与x轴的交点为
,其中
为正实数.
(1)用
表示
;
(2)求证:对一切正整数n,
的充要条件是
;
(3)若
,记
证明数列
成等比数列,并求数列
的通项公式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b7b0deaff280ebbee0f91be5acd20d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/641fec779880f75fa8ee6782f3350402.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edeb4aa8a3ca0261e0161fd7fa8bde97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
(1)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3002f56900c2924bfd79fc3865b0a02e.png)
(2)求证:对一切正整数n,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0b3c80e774501722f46f97800f1d400.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e3fd5fd833041ae95d8b7f8d2897e35.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c4223bd6ee8f82d59d244371fbcddc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dfe65f891c54780bcf1ed6a9f8a0f6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
您最近一年使用:0次
2022-11-23更新
|
1075次组卷
|
3卷引用:辽宁省沈阳市第十一中学2023-2024学年高二下学期4月阶段测试数学试卷
名校
7 . 已知函数
,其中
且
.
(1)讨论
的单调性;
(2)当
时,证明:
;
(3)求证:对任意的
且
,都有:
…
.(其中
为自然对数的底数)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d9471f77a4cd41501471bd85c48d34b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1413a67adedc88a492a3f2e21e426961.png)
(3)求证:对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52daa0cdc945df33fd98a43b930b71f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f663883e5e739184a7fc18c72a7b62ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e25da8298b6a96d627f3e8c990e55f0c.png)
您最近一年使用:0次
2022-04-03更新
|
2120次组卷
|
11卷引用:辽宁省沈阳市东北育才学校2021-2022学年高二下学期4月月考数学试题
辽宁省沈阳市东北育才学校2021-2022学年高二下学期4月月考数学试题重庆市西南大学附属中学2019-2020学年高二下学期阶段性测试数学试题苏教版(2019) 选修第一册 选填专练 第5章 微专题十五 函数、导数与不等式的综合应用重庆市实验中学2021-2022学年高二下学期第一次月考数学试题四川省泸州市泸县第一中学2021-2022学年高二下学期期中数学理科试题(已下线)第二篇 函数与导数专题4 不等式 微点9 泰勒展开式湖北省郧阳中学、恩施高中、随州二中、襄阳三中、沙市中学2022-2023学年高二下学期四月联考数学试题湖北省部分重点高中2022-2023学年高二下学期4月联考数学试题(已下线)第三章 重点专攻二 不等式的证明问题(讲)江苏省南通市通州区金沙中学2022-2023学年高二下学期5月学业水平质量调研数学试题(已下线)专题11 利用泰勒展开式证明不等式【讲】
名校
解题方法
8 . 在正六棱柱
中,
,
,M为侧棱
的中点,O为下底面ABCDEF的中心.
![](https://img.xkw.com/dksih/QBM/2022/6/26/3009747826245632/3016648524627968/STEM/6bdba7beeb164c81b7d9dc40030b3721.png?resizew=204)
(1)若平面
交棱
于点P,交棱
于点Q,在图中补全出平面
截该正六棱柱所得的截面,并指出P与Q的位置(无需证明);
(2)求证:
平面
;
(3)证明:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/858be9a2f30a22cfdebeaa5bf2e45b4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6db57eca2a7cbd91bc57372592580a76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://img.xkw.com/dksih/QBM/2022/6/26/3009747826245632/3016648524627968/STEM/6bdba7beeb164c81b7d9dc40030b3721.png?resizew=204)
(1)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f9509acc72681fb67191d79995cb3ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e64fb289ca6025309e93e3c20ac0f04b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f9509acc72681fb67191d79995cb3ac.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7121d1ab5664c6edbf4ef08cb4230c67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f9509acc72681fb67191d79995cb3ac.png)
(3)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/565133e91e3ace2b2187cfc6f1db5be6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f9509acc72681fb67191d79995cb3ac.png)
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名校
9 . 若函数
对任意的
均有
,则称函数具有性质
.
(1)判断下面函数①
;②
是否具有性质
,并说明理由;
(2)全集为
,函数
,试判断并证明函数
是否具有性质
;
(3)若函数
具有性质
,且
,求证:是否对任意
,
均有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e6f347571b113ba7618c56958ea233f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(1)判断下面函数①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abbe323771bc92bf5767e1bd9a46b946.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c904567c3b3734e1eca8d042ef7a7b2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)全集为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2029fc48d77259461f693025c39924be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/390b9e64771945e2a8119dfebd8cfdea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36d1a406338067cfdeafaf575b2fbcdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ff2aa68223dfc02f39d7d10fa005387.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92d934e15c3727e7f56e3907237c736f.png)
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2021-11-23更新
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864次组卷
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2卷引用:辽宁省沈阳市五校协作体2021-2022学年高一上学期期末联考数学试题
20-21高二·江苏·课后作业
名校
10 . 从函数角度看,
可以看成以r为自变量的函数
,其定义域是
.
(1)画出函数
的图象;
(2)求证:
;
(3)试利用(2)的结论来证明:当n为偶数时,
的展开式最中间一项的二项式系数最大;当n为奇数时,
的展开式最中间两项的二项式系数相等且最大.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afb4fb20d3a3a67baa8505623e0bd9de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abfaf2264554dc5fa6e7c20799ef9987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed3d1035e120d16bddf30c56bd475a9e.png)
(1)画出函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ec77fa26a2c9e640dc5c9611fd5a6a5.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69ca11d3c6898eec906c4597ef0c4418.png)
(3)试利用(2)的结论来证明:当n为偶数时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f5abcb3802cf02be93a8c89067bd49a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f5abcb3802cf02be93a8c89067bd49a.png)
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2021-12-06更新
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4卷引用:辽宁省沈阳市东北育才2021-2022学年高二下学期期初自我检测数学试题