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01. 数列的极限
Author:
张敬信
GeoGebra
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多邊形的面積
折扣
龙形曲线-分形龙2
撒针估算面积实验
垂直線的斜率
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乘法
Redefining Trigonometry by a Unit Circle
題六
柱體的橫截面
根據百分率找數量(一):例1的副本