抛物线面积2倍

hbghlyj · Posted at 2021-5-13 22:45:00

Last edited by hbghlyj at 2021-5-13 23:36:00M为BC中点,F在AB上,E在AC上,AM交EF于N,N关于EF中点对称到R.
P在AB上,Q在AC上,$\vec{BP}=3\vec{AB}$,$\vec{CQ}=3\vec{AC}$.
若$\frac{\overline{FB}}{\overline{BA}}+\frac{\overline{EC}}{\overline{CA}}=2$,求证$\S{PQR}=2\S{AEF}$
QQ截图20210513233525.png

kuing · Posted at 2021-5-13 23:08:36

看这里：kuing.cjhb.site/forum.php?mod=viewthread&tid=5271

hbghlyj · Posted at 2021-5-13 23:18:21

hbghlyj · Posted at 2021-5-13 23:19:54

又见Zzh巨佬的文章
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[几何] 抛物线面积2倍

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