名校
解题方法
1 . 已知等差数列
的前
项和为
,首项为
,
.数列
是等比数列,公比
小于0,且
,
,数列
的前
项和为
,
(1)记点
,证明:
在直线
上;
(2)对任意奇数
恒成立,对任意偶数
恒成立,求
的最小值.
![](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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3de34c34529c9725beacee13db7b4e42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/371473cfe69603fea1895c793219e3e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e18c9b373494f7eb0128748120c1fdaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ec0699dc1a6f668a50c3017116751e4.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)
(1)记点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5fe6bf7695ea9b0a129d9f01953360e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5a2d3cd8e283ae9d04bee5ab2e0895b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa0667ad7e7060032787706750f409e.png)
(2)对任意奇数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7db29df7dc5fdc524c6de316ac2a04cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bc489c026bcc13f539e1b22467ee8b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5eeaa30850a2dd1abcb46208ac8b6a2.png)
您最近一年使用:0次
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解题方法
2 . 比较下列各组中
与
的大小,并给出证明.
(1)
与
,其中
;
(2)
与
;
(3)
与
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b5bc4aacc85a270b2cf47c59ab0f02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74c512ead5eebabcf7d2ca3b49dfd17b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d87d7a77ae297d0dc81fa9c688161e59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec5d773175d989de798f1be8f7f5269.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0099d808c6cbd400af31ec2d5282fe37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b1212b363731f4c79a60d807810ee0e.png)
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3 . 已知:直四棱柱
所有棱长均为2,
.在该棱柱内放置一个球
,设球
的体积为
,直四棱柱去掉球
剩余部分的体积为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/19/6c3dd90c-c080-4177-9c8c-705f62e6d281.png?resizew=146)
(1)求三棱锥的
的表面积
;
(2)求
的最大值.(只要求写出必要的计算过程,不要求证明)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8081880e604d8f8a59f332b8167c1f17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4764374bd2fb78e59cd0b283637baeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63055a5d6916f99d07fede49120753f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/19/6c3dd90c-c080-4177-9c8c-705f62e6d281.png?resizew=146)
(1)求三棱锥的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac20024c3622b78dfaa2f4ef75714dee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f737b04ce09bc7e1ed86dc9b3c85203b.png)
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2022-05-19更新
|
911次组卷
|
5卷引用:黑龙江省哈尔滨师范大学附属中学2021-2022学年高一下学期期中考试数学试题
黑龙江省哈尔滨师范大学附属中学2021-2022学年高一下学期期中考试数学试题辽宁省沈阳市第一二〇中学2021-2022学年高一6月考试数学试题(已下线)8.3.1棱柱、棱锥、棱台的表面积和体积(精讲)-【精讲精练】2022-2023学年高一数学下学期同步精讲精练(人教A版2019必修第二册)(已下线)高一数学下学期期中模拟试卷(第6章-第8章8.3)-【题型分类归纳】2022-2023学年高一数学同步讲与练(人教A版2019必修第二册)新疆乌鲁木齐市第101中学2022-2023学年高一下学期期末考试数学试题
名校
4 . (1)设
,
,求
,
,
的范围.
(2)下面的问题与著名的柯西不等式有关,若a,b,c,
,请你比较
与
的大小,根据以上结论猜测
与
的大小(不必证明).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e70bbafca5c73383459c37fe7ea35f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18b2d527e76722fc897e2b8b29df89c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3910a0f217d8109b9467f740fc84a73d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/754826457671db8939098215943e656a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2122e3f1e76a635e58e4d54aa594c552.png)
(2)下面的问题与著名的柯西不等式有关,若a,b,c,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7b33ff8346b233bd4721e7c1b67488e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf7e6232a3919536f7f3a5242b1a525f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c9461a6b6880d90396b1cda5175aaf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33faeca8f9a79c61c511341a9ceea118.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ceced5a1d6a86a0207087846a662f186.png)
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解题方法
5 . 平行四边形ABCD中,
,
,如图甲所示,作
于点E,将
沿着DE翻折,使点A与点P重合,如图乙所示.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/22/ff6f32a8-1ad4-4851-b013-3200acd67296.png?resizew=371)
(1)设平面PEB与平面PDC的交线为l,判断l与CD的位置关系,并证明;
(2)当四棱锥
的体积最大时,求二面角
的正切值;
(3)在(2)的条件下,G、H分别为棱DE,CD上的点,求空间四边形PGHB周长的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f80f51c31583fea58fde645474d60b8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5595129319f9f5f069297ddb1455f97a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/22/ff6f32a8-1ad4-4851-b013-3200acd67296.png?resizew=371)
(1)设平面PEB与平面PDC的交线为l,判断l与CD的位置关系,并证明;
(2)当四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e98920101c174b991d7a8481707ab88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/715cc9ea5e7d80930284ffb117142770.png)
(3)在(2)的条件下,G、H分别为棱DE,CD上的点,求空间四边形PGHB周长的最小值.
您最近一年使用:0次
2022-06-20更新
|
1449次组卷
|
5卷引用:黑龙江省鹤岗市第一中学2021-2022学年高一下学期期末考试数学试题
名校
6 . 如图1,矩形ABCD,点E,F分别是线段AB,CD的中点,
,将矩形ABCD沿EF翻折.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/6/f4289d06-b7a3-440e-9930-5d299e03ba32.png?resizew=398)
(1)若所成二面角的大小为
(如图2),求证:直线
面DBF;
(2)若所成二面角的大小为
(如图3),点M在线段AD上,当直线BE与面EMC所成角为
时,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b58022e20e4bd2a6c25f3f3a2d14fb76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/6/f4289d06-b7a3-440e-9930-5d299e03ba32.png?resizew=398)
(1)若所成二面角的大小为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ad72d7565699d1ebb741eb0ce12bac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44b190c8d3d7d7d0e6e959e8a52eae90.png)
(2)若所成二面角的大小为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9955b5aebb73cd84447e8541f901ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/055617fcb090f104b4d163cf8fd99827.png)
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2022-04-14更新
|
1135次组卷
|
6卷引用:黑龙江省哈尔滨市第三中学2022届高三第二次模拟考试理科数学试题
黑龙江省哈尔滨市第三中学2022届高三第二次模拟考试理科数学试题(已下线)回归教材重难点03 空间向量与立体几何-【查漏补缺】2022年高考数学(理)三轮冲刺过关湖北省宜昌市夷陵中学2022届高三下学期5月四模数学试题(已下线)数学-2022年高考押题预测卷03(新高考卷)高二理数试题-河南省豫南六校2022-2023学年高二上学期第二次联考试题(已下线)新高考卷04
名校
解题方法
7 . 在高等数学中,我们将
在
处可以用一个多项式函数近似表示,具体形式为:
(其中
表示
的n次导数),以上公式我们称为函数
在
处的泰勒展开式.
(1)分别求
,
,
在
处的泰勒展开式;
(2)若上述泰勒展开式中的x可以推广至复数域,试证明:
.(其中
为虚数单位);
(3)若
,
恒成立,求a的范围.(参考数据
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11abb76da45ffa52b47c3a6b9a03ac7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69c15b525ef8e6ca5281ba79454ad6e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a33cfe27fd2276a7c542f062c17b4d85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11abb76da45ffa52b47c3a6b9a03ac7e.png)
(1)分别求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad040ae0fab73f5dd7b1af48cd3b5f93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a48345d239aaf8e9ca1ff2846c08a99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66db91bb3be9e2b6ad567774e3699758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
(2)若上述泰勒展开式中的x可以推广至复数域,试证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6d931430b1f41235a04287471c5098e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7035cd4adda5d72a9fc9f9fda75995.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69fbf62426f2cc9fe0db2b0567b7037a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0da8f0351e47d68e95fb13727bf1a1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99e4c6d95c2ae50836b6c596b6df911d.png)
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名校
解题方法
8 . 已知
.
(1)讨论
的单调性;
(2)设
、
为两个不相等的正数,且
,其中
.“以直代曲”是微积分的基本思想和重要方法.请你在①、②两种方法中选择一种(也可以同时选择①②)来证明:
.
①用直线
代替曲线
在
之间的部分;②用曲线
在
处的切线代替其在
之间的部分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bbda4df2718186afb312698f95a3f1e.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/859458471c86ae39e0cc42d2d960d03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ada28d365e8363aae387a32bf9ac70e.png)
①用直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/655c814385ae1a64373cc76c259e8bb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49e1fcca51be2f5fea9bb06d0146fa50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a945357aa4d7cb2bd48c28af862a3078.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e733ab7bdbb6bf574c8955b1fbbcec17.png)
您最近一年使用:0次
2022-05-06更新
|
933次组卷
|
3卷引用:黑龙江省哈尔滨市第三中学校2022届高三第三次模拟考试文科数学试题
名校
解题方法
9 . 已知
.
(1)求
在
上的极值;
(2)
,当
时,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c840a2372f1f3fb35d9413e602a7ce0.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ecd9b82656fa92f59cc80c8938e12f.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2955344f722ff0d548ae27325ca9b8ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82af31912fbb32c55493828b665c269a.png)
您最近一年使用:0次
名校
10 . 甲乙两队各有2位队员共4人进行“定点投篮”比赛,规定在一轮比赛中,每人投篮一次,投中一球得2分,没有投中得0分.现已知甲队两位队员每次投篮投中的概率均为
.乙队两位队员每次投篮投中的概率分别为
.
(1)若
,分别计算甲乙两队在一轮比赛中得2分的概率,并根据这两个数据说明哪个队在一轮比赛中得到2分的可能性大?
(2)某同学发现:若
,则甲乙两队在一轮比赛中得分的期望值就相等;他根据这一发现又得出结论:若
,则在一轮比赛中,按两队的均分决定胜负,这两队一定是平局;记在一轮比赛中甲队得分为
,乙队得分为
,请你写出甲乙两队得分的分布列,对该同学的发现的正确性给予证明,并简要说明该同学得出的结论是否正确.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8be646cd52d7f2f1714e7542e75810f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16fba841ac235df0c80dc3e740de3eca.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd7d0c055b19188174b2f965403d0e30.png)
(2)某同学发现:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f4e2e3eae7e000ef50ab6b484c23300.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b7cd1b0a60bf2b8f5a7756203858d49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5c1116ce7f5a1a7b57517276d5092fa.png)
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2022-04-15更新
|
542次组卷
|
3卷引用:黑龙江省鸡西市鸡东县第二中学2022-2023学年高三上学期期中数学试题
黑龙江省鸡西市鸡东县第二中学2022-2023学年高三上学期期中数学试题内蒙古呼和浩特市2022届高三第一次质量数据监测理科数学试题(已下线)回归教材重难点06 概率与统计-【查漏补缺】2022年高考数学(理)三轮冲刺过关