题目
题型:浙江省月考题难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161853-70004.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161853-45880.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161853-39556.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161853-87980.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161854-55916.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161854-52395.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161854-61561.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161854-67556.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161855-81279.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161855-69164.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161855-45111.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161855-19757.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161856-20226.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161856-79414.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161856-91181.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161857-14966.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161857-89775.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161857-33641.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161857-29472.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161857-78261.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161858-99693.gif)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161858-46380.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161858-92503.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161859-36938.gif)
(2)求
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161859-12940.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161859-70515.gif)
(3)是否存在点
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161859-29227.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161900-55540.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161900-88244.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161900-48009.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161900-94391.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161901-58248.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161901-83889.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161901-33947.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161901-46229.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161902-39805.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161902-76342.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161902-97790.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161902-97362.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161903-57622.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161903-66955.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161903-42474.gif)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161904-67379.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161904-77181.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161904-21889.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161904-58560.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161904-82148.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161905-11664.gif)
即y关于x的函数关系式为:
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161905-82201.gif)
(3)存在,分三种情况:
①当
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161905-11620.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161905-79925.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161906-81895.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161906-48000.gif)
则
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161906-72429.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161906-18833.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161906-50941.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161907-42944.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161907-38061.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161907-96481.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161908-31188.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161908-76070.gif)
②当
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161908-90872.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161908-79437.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161909-59960.gif)
③当
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161909-24820.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161909-25667.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161909-89765.gif)
于是
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161910-91163.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161910-23457.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161910-87128.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161910-48785.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161911-80412.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161911-29602.gif)
综上所述,当x为
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161911-16164.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161911-57594.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103161911-41491.gif)
核心考点
试题【如图,在中,,,,分别是边的中点,点从点出发沿方向运动,过点作于,过点作交于,当点与点重合时,点停止运动.设,.(1)求点到的距离的长;(2)求关于的函数关系式】;主要考察你对相似三角形性质等知识点的理解。[详细]
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