如图
,过P作
且
,得
,再过点
作
且
,连接
,得
;又过点
作
且
,得
;依此法继续作下去,得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ef56d00fd2f7d6d8127533f173da34.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9934cf2feb65b00392ba39d8242e47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35731a3dd7ba099870340f742c04b67a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9f5b1e8b7b5c5e5a555fa92b0a3ea05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6552a012a1c7878bec88667b7296b58b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e8a779ecf16304bb1b44a1674211499.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bb35bfa99ac9a89185cc8658e2a4585.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ae18c3151ef1283fbd7854562fdfc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/288ec0f13f156cc83d20d1ad8ca40ed7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2489ef0e2e6dac9762daaf40b6c21d44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4504d9c670739960e8afb991988760a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdc73dc268e5e360d1ec42a84f3c114e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ef56d00fd2f7d6d8127533f173da34.png)
更新时间:2023-03-26 09:50:24
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