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[几何] 2022年高考浙江卷第17题 到单位正八形顶点距离平方和范围

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isee posted 2022-6-13 17:48 |Read mode
Last edited by isee 2022-6-14 17:34题:设点 $P$ 在单位圆的内接正八边形 $A_1A_2\cdots A_8$ 的边\(A_1A_2\) 上,则$\overrightarrow{PA}_{1}^{2}+{{\overrightarrow{P{{A}_{2}}}}^{2}}+\cdots +\overrightarrow{PA}_{8}^{2}$的取值范围是_______.
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isee=freeMaths@知乎

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kuing posted 2022-6-14 17:26
向量秒,`\vv{PA_i}=\vv{PO}+\vv{OA_i}`

see also: forum.php?mod=redirect&goto=findpost& … tid=253&pid=1476

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