1 . 已知
的内角
所对边分别为
.若
内部有一个圆心为
,半径为
米的圆,它沿着
的边内侧滚动一周,且始终保持与三角形的至少一条边相切.
为边长是16米的等边三角形,求圆心
经过的路程;
(2)若用28米的材料刚好围成这个三角形,请你设计一种
的围成方案,使得圆心
经过的路程最大并求出该最大值(若
为正数,则
,当且仅当
时取等号).
![](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/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)若用28米的材料刚好围成这个三角形,请你设计一种
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/529b18236d8040085fea20d0bdb60c66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44acc0ee22dc4b7750e8be825e7c1355.png)
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2023-07-14更新
|
428次组卷
|
2卷引用:山东省潍坊市2022-2023学年高一下学期期末数学试题
10-11高一下·山东·期末
2 .
已知向量
与向量
的对应关系可用
表示.试问是否存在向量
,使得
成立?如果存在,求出向量
;如果不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2011/7/12/1570255702491136/1570255707906048/STEM/98d93ffd964041d08f3ff48d572272fa.png?resizew=12)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d0de95dc888471ed33cf137b5284226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84ec160a0518fbd3e3ea4293e51ac769.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b97438095118901a45782f8991d0569f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2a97bc0e5239bd6dbc19e531bfca463.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4177a11cd3853401ad352f492820f379.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9856ad2a8dd1b673ec2cfa9ee0a1eaff.png)
您最近一年使用:0次