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一元二次方程式
Author:
李正仁
Topic:
Mathematics
GeoGebra
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異分母分數減法
三位數除以一位數（一）
兩組對邊相等和有直角的四邊形
球体的体积推导
【案例】圆柱体内放置一个大球六个小球
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方輪與方路
均分除法（分數÷整數）
homework3
earth
二重積分 (Double Integral)的副本
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Means
Real Numbers
Circle
Trigonometry
Planes