名校
解题方法
1 . 如图所示,正方体
的棱长为a.
的顶点A,B,
截下一个三棱锥
,求正方体剩余部分的体积;
(2)若M,N分别是棱AB,BC的中点,请画出过
,M,N三点的平面与正方体
表面的交线(保留作图痕迹,画出交线,无需说明理由),并求出交线围成的多边形的周长;
(3)设正方体
外接球的球心为O,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdaa8065bea92fe61bce56090d8cb235.png)
(2)若M,N分别是棱AB,BC的中点,请画出过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
(3)设正方体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ed8bc19143dceae0ee7d6e1f7a27da1.png)
您最近一年使用:0次
2 . 已知函数
.
(1)某同学打算用“五点法”画出函数
再某一周期内的图象,列表如下:
请填写上表的空格处,并写出函数
的解析式;
(2)若函数
,将
图象上各点的纵坐标不变、横坐标扩大到原来的2倍,再向右平移
个单位,得到函数
的图象,若
在
上恰有奇数个零点,求实数a与零点的个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3e613ec74a2f330b57a235439510dc5.png)
(1)某同学打算用“五点法”画出函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
x | ![]() | ![]() | ![]() | ||
![]() | 0 | ![]() | ![]() | ![]() | ![]() |
![]() | 0 | 1 | 0 | ![]() | 0 |
![]() | 0 | ![]() | 0 | 0 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bfa338e78c528663f0602c60f3f594d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1a63ab608517bb10aa036783dfb51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecdb2704ea6bc44b5a75fb3c8a100353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aab44d48c65864b1f46ea3647437bbe.png)
您最近一年使用:0次
名校
3 . 已知函数f(x)是定义在R上的奇函数,且当x≤0时,f(x)=x2+2x.
![](https://img.xkw.com/dksih/QBM/2019/1/8/2114189271760896/2115174370729984/STEM/bb34c31c054f432d9ee4a50926f6786b.png?resizew=290)
(1)现已画出函数f(x)在y轴左侧的图象,如图所示,请补全函数f(x)的图象;
(2)求出函数f(x)(x>0)的解析式;
(3)若方程f(x)=a恰有3个不同的解,求a的取值范围.
![](https://img.xkw.com/dksih/QBM/2019/1/8/2114189271760896/2115174370729984/STEM/bb34c31c054f432d9ee4a50926f6786b.png?resizew=290)
(1)现已画出函数f(x)在y轴左侧的图象,如图所示,请补全函数f(x)的图象;
(2)求出函数f(x)(x>0)的解析式;
(3)若方程f(x)=a恰有3个不同的解,求a的取值范围.
您最近一年使用:0次
2019-01-09更新
|
1142次组卷
|
9卷引用:【市级联考】河南省驻马店市2018-2019学年高一上学期期中考试数学试卷
【市级联考】河南省驻马店市2018-2019学年高一上学期期中考试数学试卷河南省淮阳县陈州高级中学2019-2020学年高一上学期期中考试数学试题湖南省邵阳市第二中学2021-2022学年高一上学期期中数学试题湖南省株洲市第二中学2021-2022学年高一上学期期中数学试题人教A版(2019) 必修第一册 突围者 第三章 3.2课时3 奇偶性河南省郑州市106中学2019-2020学年高一上学期9月月考数学试题(已下线)练习3+函数的概念与性质-2020-2021学年【补习教材·寒假作业】高一数学(人教A版2019)(已下线)第三章 函数的概念和性质(章末测试)-【上好课】2021-2022学年高一数学同步备课系列(人教A版2019必修第一册)青海省海南藏族自治州高级中学2022-2023学年高三上学期10月月考数学(理)试题
4 . 某同学用“五点法”画函数
在某一周期内的图像时,列表并填入的部分数据如下表:
(1)请填写上表的空格处;并画出函数
图像或者写出函数
的解析式
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/6/2fdc6ee5-ae3e-4340-8c22-1bb6ef809af6.png?resizew=197)
(2)将函数
的图像向右平移
个单位,再所得图像上各点的横坐标缩小为原来的
,纵坐标不变,得到函数
的图像,求
的单调递增区间;
(3)在(2)的条件下,若
在
上恰有奇数个零点,求实数
与零点个数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/700139c95bcc630cf76137afe8033c50.png)
![]() | ![]() | ![]() | ![]() | ||
![]() | 0 | ![]() | π | ![]() | 2π |
![]() | 0 | 1 | 0 | -1 | 0 |
![]() | 0 | ![]() | 0 | 0 |
(1)请填写上表的空格处;并画出函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3f1e9f8b0838014d5fc413dcea7f7e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3f1e9f8b0838014d5fc413dcea7f7e7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/6/2fdc6ee5-ae3e-4340-8c22-1bb6ef809af6.png?resizew=197)
(2)将函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f785147690f83dcee0a0bc6c327e75a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/028517e8bebe634441e0a5c79828e88a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23113994956fe7c5c3a344a0d2a473a2.png)
(3)在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da21f0f517988840d2b64da208e0c528.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19d46612ff8e4b935b2d8b7822e341a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
2022-03-31更新
|
500次组卷
|
2卷引用:上海市徐汇区2020-2021学年高一下学期期中数学试题
名校
解题方法
5 . 将正三角形(1)的每条边三等分,并以中间的那一条线段为底边向外作正三角形,然后去掉底边,得到图(2);将图(2)的每条边三等分,并以中间的那一条线段为底边向外作正三角形,然后去掉底边,得到图(3);如此类推,将图(
)的每条边三等分,并以中间的那一条线段为底边向外作三角形,然后去掉底边,得到图
.上述作图过程不断的进行下去,得到的曲线就是美丽的雪花曲线.若图(1)中正三角形的边长为1,则图(
)的周长为__________ ,图(
)的面积为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aceb113626093e0e431f30fa45c2c444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/cc4bbbc0-a228-404d-981c-94e842b746b2.png?resizew=216)
您最近一年使用:0次
2021-08-09更新
|
1073次组卷
|
6卷引用:山东省青岛市青岛第五十八中学2021-2022学年高三上学期期中数学试题
名校
解题方法
6 . 在通用技术课上,老师给同学们提供了一个如图所示的木质四棱锥模型
,
为正三角形,
,
,
为线段
的中点.
平面
;
(2)过点
的平面
交
于点
,沿平面
将木质四棱锥模型切割成两部分,在实施过程中为了方便切割,请你完成以下两件事情:
①在木料表面应该怎样画线?(在答题卡的图上画线要保留辅助线,并写出作图步骤);
②在木质四棱锥模型中确定
点的位置,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c753cb1eb73fd8d136d00462970797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ad8d16722f5b9e7fd2602f14d5ffbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b0382c28547d3834ca71f3f0677695.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/0457394ce4f2dc8d940c565c94dcf557.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d94061dfdcef084c7594522ae9e512a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
①在木料表面应该怎样画线?(在答题卡的图上画线要保留辅助线,并写出作图步骤);
②在木质四棱锥模型中确定
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8136c029f4b31e25c56c70a1432cbe1a.png)
您最近一年使用:0次
名校
7 . 在长方体
中,
![](https://img.xkw.com/dksih/QBM/2022/4/22/2963859932143616/2965085801979904/STEM/c1c30d77-309a-4633-8652-cf4b4675dfb6.png?resizew=399)
(1)已知P、Q分别为棱AB、
的中点(如图1),做出过点
,P,Q的平面与长方体的截面.保留作图痕迹,不必说明理由;
(2)如图2,已知
,
,
,过点A且与直线CD平行的平面
将长方体分成两部分.现同时将两个球分别放入这两部分几何体内,则在平面
变化的过程中,求这两个球的半径之和的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://img.xkw.com/dksih/QBM/2022/4/22/2963859932143616/2965085801979904/STEM/c1c30d77-309a-4633-8652-cf4b4675dfb6.png?resizew=399)
(1)已知P、Q分别为棱AB、
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
(2)如图2,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f25936291abb6432ed5a710ebf0ea195.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf7679c8b4b1e442ce4286d4b0e9c32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eaba7d7d6f2f3d6d4a2fe85d3c427f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
您最近一年使用:0次
2022-04-24更新
|
696次组卷
|
2卷引用:福建省厦门双十中学2021-2022学年高一下学期期中考试数学试题
8 . 如图所示,在正方体
中,点
在棱
上,且
,点
、
、
分别是棱
、
、
的中点,
为线段
上一点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/6cdf8094-b71d-4477-865e-03ffabb084f5.png?resizew=148)
(1)若平面
交平面
于直线
,求证:
;
(2)若直线
平面
,
①求三棱锥
的表面积;
②试作出平面
与正方体
各个面的交线,并写出作图步骤,保留作图痕迹设平面
与棱
交于点
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fbafedc202bd0d86c4dfdece9f8f4fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f01d1dd10776b00e9df008f03f2608c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cdc08e1c4a04a18d5ecea03393e36d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/6cdf8094-b71d-4477-865e-03ffabb084f5.png?resizew=148)
(1)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7a447dc58e10adb7c8014071651e7c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b54387f870ae37f7951b253665d64f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ba669c69462fbbff2ef12ea9015fc8.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/565133e91e3ace2b2187cfc6f1db5be6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7a447dc58e10adb7c8014071651e7c9.png)
①求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b03980f99fa0f339388e564466e8b94.png)
②试作出平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbf62b9fe96ad0b0f58c8b3ba3075ab5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbf62b9fe96ad0b0f58c8b3ba3075ab5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a4a7ba7546acc68f9cff46f1c53557f.png)
您最近一年使用:0次
2020-11-06更新
|
1989次组卷
|
6卷引用:北京市第八十中学2021-2022学年高一下学期期中考试数学试题
北京市第八十中学2021-2022学年高一下学期期中考试数学试题北京市中国人民大学附属中学2019-2020学年高一下学期数学期末练习试题(已下线)专题05 立体几何初步(重点)-2020-2021学年高一数学下学期期末专项复习(北师大版2019必修第二册)(已下线)专题06 立体几何初步(难点)-2020-2021学年高一数学下学期期末专项复习(北师大版2019必修第二册)江苏省镇江第一中学2021-2022学年高一下学期6月月考数学试题(已下线)高一下学期期末真题精选(压轴60题20个考点专练)-【满分全攻略】2022-2023学年高一数学下学期核心考点+重难点讲练与测试(人教A版2019必修第二册)
9 . 设
,如果函数
:
的值域也是
,则称之为一个泛函数,并定义其迭代函数列
:
,
.
(1)请用列表法补全如下函数列;
(2)求证:对任意一个
,存在正整数
(
是与
有关的一个数),使得
;
(3)类比排序不等式:
,
,把
中的10个元素按顺序排成一列记为
,使得10项数列
:
,
,
,…,
的所有项和
最小,并计算出最小值
及此时对应的
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a0367345901c5a716dca179385158c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca4ff0af96ea467337cb30c4c765b5f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84315a088ff3d8b91be22d3b3fcd92ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f99442281052744a6b74b32e0fc2536f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66a88cbaed58dcf9671ba9240359b9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89b2c1a76a73797e9d5699f6c9929a50.png)
(1)请用列表法补全如下函数列;
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | |
2 | 1 | 7 | 5 | 3 | 4 | 9 | 10 | |||
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/002bda38860f9cbc17dd7b6a03cfecf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24d5926ad4ccd91c0ec7ff14018de8b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5328785361a76b5e8f75b034a07c5e35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b526c87ad796e8cd189f88c33c8d8fd.png)
(3)类比排序不等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0109ae0739494164db5b7edae7bfb2e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd643dcc6985a78b5dfe3127610e920e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eee7088c883282e2f7d95a1856902fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87139b2d092ad22a082bd2a9fa31901d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4aac3646575e397de3dee4ed5d1060b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38f27bc508f582e07211ee24d01bc551.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e77ac9dd1c3046137614c0f62e55190.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd643dcc6985a78b5dfe3127610e920e.png)
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名校
10 . 如图☆的曲线,其生成方法是(I)将正三角形【图(1)】的每边三等分,并以中间的那一条线段为一底边向形外作等边三角形,然后去掉底边,得到图(2);(II)将图(2)的每边三等分,重复上述的作图方法,得到图(3);(III)再按上述方法继续做下去,所得到的曲线称为雪花曲线(Koch Snowflake),
![](https://img.xkw.com/dksih/QBM/2020/1/6/2371404175564800/2372193744011265/STEM/61de2d7304d64a70a63db49b349ef291.png?resizew=26)
(1)
(2)
(3)
.
设图(1)的等边三角形的边长为1,并且分别将图(1)、(2)、(3)…中的图形依次记作M1、M2、M3、…
…
(1)设
中的边数为
中每条边的长度为
,写出数列
和
的递推公式与通项公式;
(2)设
的周长为
,
所围成的面积为
,求数列{
}与{
}的通项公式;请问周长
与面积
的极限是否存在?若存在,求出该极限,若不存在,简单说明理由.
![](https://img.xkw.com/dksih/QBM/2020/1/6/2371404175564800/2372193744011265/STEM/61de2d7304d64a70a63db49b349ef291.png?resizew=26)
![](https://img.xkw.com/dksih/QBM/2020/1/6/2371404175564800/2372193744011265/STEM/0a55eefe3191444fa5fae446208e07c7.png?resizew=129)
![](https://img.xkw.com/dksih/QBM/2020/1/6/2371404175564800/2372193744011265/STEM/7020d600d2a146ebbf97a487419a85eb.png?resizew=118)
![](https://img.xkw.com/dksih/QBM/2020/1/6/2371404175564800/2372193744011265/STEM/fbabab9d58a84598ab4a47e4f8263d0d.png?resizew=127)
![](https://img.xkw.com/dksih/QBM/2020/1/6/2371404175564800/2372193744011265/STEM/f14e97f951fb4951bf71a0c3467d0e6a.png?resizew=134)
设图(1)的等边三角形的边长为1,并且分别将图(1)、(2)、(3)…中的图形依次记作M1、M2、M3、…
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ddad3d9fdb5e9951b6a1c31f9a72a71.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ddad3d9fdb5e9951b6a1c31f9a72a71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0b4b5c950c54ee4fe07792099b0d343.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ba6923490821b5d5af1ef0025560d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eded65284816fdf6bf335b0c2a78e6a.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ddad3d9fdb5e9951b6a1c31f9a72a71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5a2d3cd8e283ae9d04bee5ab2e0895b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ddad3d9fdb5e9951b6a1c31f9a72a71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5a2d3cd8e283ae9d04bee5ab2e0895b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5a2d3cd8e283ae9d04bee5ab2e0895b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
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