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试验次数与频率的关系（投掷一枚硬币）
Author:
Zhang Guangmin
Topic:
Probability
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
球體建築師
異分母分數減法
【案例】圆柱体内放置一个大球六个小球
球体的体积推导
Discover Resources
圓外一點到圓的距離
(1+x/n)^n 逼近 exp(x)
極值對稱於反曲點
ie 6
銳角三角：sin, cos
Discover Topics
Perimeter
Polynomial Functions
Plane Figures or Shapes
Reflection
Ellipse