1 . 魔方,又叫鲁比克方块,最早是由匈牙利布达佩斯建筑学院厄尔诺•鲁比克教授于1974年发明的机械益智玩具,自1974年魔方问世起,世界上陆续出现了各种各样的魔方,魔方爱好者小明拥有一款“Zcube三面体曲面三阶魔方”,它的直观图如图所示,它由27个小块构成(其中,包含18个边长为
的正方体小块,9个底面半径为
,高为
的
个圆柱小块),则该魔方的表面积为______
;体积为______
(魔方中的空邠忽略不计).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c78d0ab561d0c9bb9099772c596af8bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c78d0ab561d0c9bb9099772c596af8bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c78d0ab561d0c9bb9099772c596af8bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ce13774b09ff2edddaf21a072cf60a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc6d1d99afa158b4ba4fc0dae562fcc1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/13/7a5131f8-b792-4e21-9467-2c264c99c301.png?resizew=385)
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2 . 已知函数
则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f71599cd707909eb30d2a54be7f8c966.png)
______ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f33d3519301745e4b7f2171a4f3bdf21.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a51e861824cc334c3f69d3792491cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f71599cd707909eb30d2a54be7f8c966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f33d3519301745e4b7f2171a4f3bdf21.png)
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解题方法
3 . 如图,正六边形的边长为2,点
为正六边形的中心,若点
在正六边形的外接圆上运动,点
在半径为1的小圆
上且关于圆心
对称,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61557cca4e2f97defc23aeb18b13f724.png)
__________ ;
的最大值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.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/61557cca4e2f97defc23aeb18b13f724.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a10f8bd40e4a7f293185f31d2ef8a0f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/19/79e5b134-8f00-423d-851a-8d297ad6d8e7.png?resizew=136)
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名校
4 . 设x,y为实数,若
,则
的最大值为________ ;
的最小值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c8ad3b3f438432c45a0c85fd6856a8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88584cf1df43e28d03592c7998b1653.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29ebc856291255f2d4a6c20b982a2442.png)
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2022-08-04更新
|
1006次组卷
|
3卷引用:浙江省绍兴市诸暨市2021-2022学年高二下学期学考模拟(5)数学试题
5 . 已知
的三个内角
所对的边分别为
,则边
= ____________ ,
的面积为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7132c2d8b2ff504e6c2ba36c4f6dcfaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0213c285f449f09b914dfec50ed98cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解题方法
6 . 设复数
, 则在复平面内复数
对应的点在第__________ 象限, 且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c1b6e843638145c44107cfa714fa502.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5df9e419a8f4f42d824ccd93f4ebf98a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c1b6e843638145c44107cfa714fa502.png)
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名校
解题方法
7 . 已知函数
,若关于
的方程
恰有3个不相等的实数根,则实数
的取值范围是______________ ;若关于
的方程
恰有4个不相等的实数根
,则
的取值范围是_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9a0af36cf9cc435b019b7538f0c2424.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8ccd22fd0ca1a8e1468329284f91b6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c8d2cde628b9fc745ccba9dcafc0738.png)
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2022-03-17更新
|
882次组卷
|
2卷引用:安徽省淮北一中、安师大附中、铜陵一中、中科大附中四校2021-2022学年高一下学期学业水平调研数学试题
8 . 已知函数
则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eba6f464aa447524ec2e4183abb6e64f.png)
________ ;方程
的解为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fbbc4559d977a989ae409de82342b21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eba6f464aa447524ec2e4183abb6e64f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907e4ba6d5f2eea68442def1911957fe.png)
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2022-03-11更新
|
1219次组卷
|
2卷引用:北京市第一次普通高中2022届高三学业水平合格性考试数学试题
9 . 龙曲线是由一条单位线段开始,按下面的规则画成的图形:将前一代的每一条折线段都作为这一代的等腰直角三角形的斜边,依次画出所有直角三角形的两段,使得所画的相邻两线段永远垂直(即所画的直角三角形在前一代曲线的左右两边交替出现).例如第一代龙曲线(图1)是以
为斜边画出等腰直角三角形的直角边
、
所得的折线图,图2、图3依次为第二代、第三代龙曲线(虚线即为前一代龙曲线).
、
、
为第一代龙曲线的顶点,设第
代龙曲线的顶点数为
,由图可知
,
,
,则
___________ ;数列
的前
项和![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/473913c0887bb64d386f4c02f1853452.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4841a7238ffb7413e715d0dfde3c15f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7469dfbc8ceaec60ecf05a696e5ff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04b56e44e4f0424a2b7a45567120a2e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4266c478e7b7c642a10d37c24896a703.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f92fbacd0a1a4a2f3f5094ece399e34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e4487468ab2823d6dbf7f0ebd2eb38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6a8eef8182b33a4f2514f87296d4a9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
![](https://img.xkw.com/dksih/QBM/2022/1/21/2899349213429760/2902165343936512/STEM/308c0d3c-6468-458e-bd4e-e1316e61bbf6.png?resizew=682)
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2022-01-25更新
|
1287次组卷
|
6卷引用:江苏省南京市金陵中学2022届高三学业水平选择性模拟考前最后一卷数学试题
解题方法
10 . 若数列
通项公式为
,记前n项和为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9bbe98100c8067ff36ac536d043a85.png)
___________ ;![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9620357ea5be4037cfdccd09a27d3862.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9260f8989cfd0ffca5a49ffbc0668f14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9bbe98100c8067ff36ac536d043a85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9620357ea5be4037cfdccd09a27d3862.png)
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