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解题方法
1 . 设正n边形的边长为1,顶点依次为
,若存在点P满足
,且
,则n的最大值为__________ .(参考数据:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252bab154aa5bdc9b4bce4c0d43aaf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/470c98bbdfd975f85036bdd48e59d92e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e071a13edd9a57280b7aeeeac704dfdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b56606e332e4578c9435fcccb4067260.png)
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名校
2 . 如图,是两个齿轮传动的示意图,已知左右两个齿轮的半径分别为
和
,两齿轮中心在同一水平线上,距离为
,标记初始位置
点为左齿轮的最右端,
点为右齿轮的最上端,试问在履带带动齿轮转动过程中
两点之间距离的最小值为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/5/865ba005-9774-4be3-bfa9-145466827cc9.png?resizew=200)
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3 . 已知
,若关于
的方程
恰有三个不同的解,则满足上述条件的
的值可以为_____________ .(写出一个即可)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d063529271d7c206a7a1e5c1d0ee12d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b028fadf04ca478c5bc16de707c3d6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
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4 . 如图,在△ABC中,
,
,
,直线FM交AE于点G,直线MC交AE于点N,若△MNG是边长为1的等边三角形,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8380348b1978556a8f55d58a58adcbe7.png)
___________ .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/049d8d5b-b8f4-44fd-a989-ec69e6d92bbc.png?resizew=199)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ed8ca6318993a47d7214f0632a40935.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5749a9cf79cf78e57fcaaa1b3ff1acb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/538430485ba05653495cfd10576768db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8380348b1978556a8f55d58a58adcbe7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/049d8d5b-b8f4-44fd-a989-ec69e6d92bbc.png?resizew=199)
您最近一年使用:0次