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求軌跡方程式2

回復 1# shmilyho 的帖子

P0pQq0R13M2q2p 

直線PR之斜率為3p,直線PQ之斜率為1p3

  1p3=0qp0q=3pp2M23pp22p23pp2+242p43249=0x+24y43249=02y23y+x=0

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