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test
Author:
lunhsin
GeoGebra
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垂直線的斜率
画直线等分三角形的面积
平行線的斜率
兩位數除以一位數(二)
兩位數加法
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無意義
test
reflection points
一个函数的零点个数.许兴华数学
任意三棱锥的外接球
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Subtraction
Differential Calculus
Dilation
Cylinder
Quadratic Functions