5点を通る二次曲線　4点を固定したときの中心と焦点の軌跡　≪記事作成用≫ | Desmos

係数の演算

40

5点を通る二次曲線

58

5点を通る二次曲線の式を演算で求める

69

二次曲線の焦点を係数から求める

88

九点円錐曲線

115

九点円錐曲線の九点

140

九点円錐曲線上に点を動かし、対応する焦点の軌跡を描く

154

二次曲線群

177

Expression 182:

182

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183

184

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