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一元二次方程式公式解步驟
Author:
hou yi ting
用GGB學一元二次方程式公式解
GeoGebra
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柱體建築師
兩位數加法
異分母分數減法
球体的体积推导
兩組對邊相等和有直角的四邊形
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已知橢圓 x^2/a^2+y^2/b^2=1 (a>b>0)
有趣的切圓
二次函数的条件最值
二次函數（第四階段）
More about Function
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Constructions
Set Theory
Definite Integral
Scalene Triangles
Continuity