如图,
,点
在
上,
,以下四个结论:①
;②
;③
;④
.其中一定正确的是________ .(填序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a48e31deb78dadacc7e128ef3eb2a054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1070d38d2fea1dc88c6eb31d320b763.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/220996ebf02caa6dab7969becf157f1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64bb5e76b7cfd865c6c18fc2102f3011.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e04ad100c1aa2f942b7f6260b5575a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/9/48f63b96-8fc1-4139-bb50-c5adef06ab41.png?resizew=128)
更新时间:2023-03-07 22:43:49
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【推荐1】如图,
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(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d29e7c4d6216690152430b09f9cf0c2.png)
______________
(填“
”“
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(2)若
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(1)
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(2)若
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【推荐1】如图已知:
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