“圆锥曲线上四点共圆充要条件”的统一证明及简单拓展。

“圆锥曲线上四点共圆充要条件”的统一证明及简单拓展。

SHU XUE JIAO XUE ›› 2013, Vol. 1 ›› Issue (1) : 27-28.

SHU XUE JIAO XUE ›› 2013, Vol. 1 ›› Issue (1) : 27-28.

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