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内凹的正方形
Author:
辛贺华
GeoGebra
New Resources
第八周作业3
常见四边形是否是双心四边形
斐波那契螺旋弧线(表格法)
盈利與虧蝕
折扣
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正方形與正三角形
圓形,三角形軌跡觀察
三次函數02
兩圓及交弦
拋物線5--包絡線法
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Logarithmic Functions
Calculus
Limits
Cylinder
Straight Lines