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橢圓之極偶 / polarity for ellipse
Author:
XIE Yuheng
GeoGebra
New Resources
兩位數加法
判斷球體
錐體建築師
找出對稱軸
【案例】2013年安徽高考15题
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等腰三角形 － 等角對等邊
題 5
Newton
已知A(1,2)與B(3,4)為兩定點,P(x,y)為直線x+2y=3上一點,求當直線PA=直線PB時 , P的坐標?
橢圓
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Means
Continuity
Kite
Special Points
Linear Programming or Linear Optimization