如图,∠AOB的边OB与x轴正半轴重合,点P是OA上的一动点,点N(3,0)是OB上的一定点,点M是ON的中点,∠AOB=30°,要使PM+PN最小,则点P的坐标为______ .
![](https://img.xkw.com/dksih/QBM/2018/4/16/1925358351671296/1930322234466304/STEM/cc53f5ca3aca4af9accaa4c1b553fe1a.png?resizew=220)
2017高三·全国·专题练习 查看更多[1]
(已下线)《2017届优生百日闯关系列》【专题一】第一关 以几何图形中的动点最值问题为背景的选择填空题
更新时间:2018-04-23 15:53:33
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【知识点】 几何证明选讲
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【推荐1】A.(选修4﹣4坐标系与参数方程)已知点A是曲线ρ=2sinθ上任意一点,则点A到直线
的距离的最小值是__ .
B.(选修4﹣5不等式选讲)不等式|x﹣log2x|<x+|log2x|的解集是__ .
C.(选修4﹣1几何证明选讲)如图所示,AC和AB分别是圆O的切线,且OC=3,AB=4,延长AO到D点,则△ABD的面积是__ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48c24c369745d105af2ee9a9c98ad771.png)
B.(选修4﹣5不等式选讲)不等式|x﹣log2x|<x+|log2x|的解集是
C.(选修4﹣1几何证明选讲)如图所示,AC和AB分别是圆O的切线,且OC=3,AB=4,延长AO到D点,则△ABD的面积是
![](https://img.xkw.com/dksih/QBM/2011/5/23/1570219273396224/1570219278704640/STEM/a5525f97610e4104b02ba45c1e4f3ada.png?resizew=137)
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【推荐2】如图,
,
是圆
上的两点,且
,
,
为
的中点,连接
并延长交圆
于点
,则
=_____ .
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937245184/STEM/8ca282cd244444a89b9f5631212d4d62.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937245184/STEM/452f7182447a4af2a71e3bb7c06efbfb.png?resizew=16)
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![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937245184/STEM/263b03691d404cc7a2c7f82db3068731.png?resizew=17)
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