如图,边长为4的等边△ABC,AC边在x轴上,点B在y轴的正半轴上,以OB为边作等边△OBA1,边OA1与AB交于点O1,以O1B为边作等边△O1BA2,边O1A2与A1B交于点O2,以O2B为边作等边△O2BA3,边O2A3与A2B交于点O3,…,依此规律继续作等边△On﹣1BAn,则
的横坐标_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13be09bf71dd0a444716121e801cfaed.png)
![](https://img.xkw.com/dksih/QBM/2020/6/24/2491557858951168/2493622569844736/STEM/b3c25fed1a59493e89a5d6af374c4cc1.png?resizew=150)
更新时间:2020-07-05 21:33:21
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【推荐1】如图,
和
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【推荐2】如图,已知等边
的边长为10,点P是
边上的一个动点(与点A、B不重合).直线l是经过点P的一条直线,把
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【推荐1】如图,圆心都在x轴正半轴上的半圆O1,半圆O2,…,半圆On与直线l相切.设半圆O1,半圆O2,…,半圆On的半径分别是r1,r2,…,rn,则当直线l与x轴所成锐角为30°,且r1=1时,r2018=________ .
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【推荐2】如图,在平面直角坐标系xOy中,已知点M0的坐标为(1,0),将线段OM0绕原点O逆时针方向旋转45°,再将其延长到M1,使得M1M0⊥OM0,得到线段OM1;又将线段OM1绕原点O逆时针方向旋转45°,再将其延长到M2,使得M2M1⊥OM1,得到线段OM2;如此下去,得到线段OM3,OM4,OM5,…根据以上规律,请直接写出OM2016的长度为____ .
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【推荐1】如图,在矩形
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