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Discuz Math Forum»Forum › Mathematics › High School › 位似&轨迹&圆锥曲线
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[不等式] 位似&轨迹&圆锥曲线

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hbghlyj

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hbghlyj posted 2019-7-29 19:40 |Read mode
平面上五定点A、B、C、E、F,D是一给定直线上一动点,直线BC、CA、AB上有三点U、V、W,满足△UVW与△DEF位似过A作EF平行线QR,过B作FD平行线RP过C作DE平行线PQ.求证:当D运动时,△PQR与△UVW的位似中心在一过A的定圆锥曲线上
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