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周界

Author:kennylau, Anthony OR 柯志明

周界

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祖冲之的期望：内棋与外棋
直線的斜率
漂亮的摇摆曲线
【案例】2013年安徽高考15题
垂直線的斜率

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兩圓滾動軌跡
intersection: surface-surface, curve-curve
二次函数图象与a,m,k关系的副本
拋物線5--包絡線法
幂函数

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Polygons
Set Theory
Sequences and Series
Algebra
Angles

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