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卡特蘭數 (Catalan Number)
Author:
羅驥韡 (Pegasus Roe)
GeoGebra
New Resources
球体的体积推导
異分母分數減法
球体的体积推导（优化版）
【案例】2018年全国1卷理科12题
【案例】圆柱体内放置一个大球六个小球
Discover Resources
Sequence指令練習(包絡線：拋物線)
圓在直線上滾動
等截距和直線包絡拋物線
劉徽的「割圓術」的副本
xsin(x)
Discover Topics
Plane Figures or Shapes
Straight Lines
Area
Logarithmic Functions
Random Variables