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重难题组周练（1）——二次函数
Author:
程洁
Topic:
Quadratic Functions
GeoGebra
New Resources
美國國旗 (Claude 版)
小数 的副本
找出對稱軸
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兩組對邊相等的四邊形
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分數除法5: x ÷ a/b (包含)
動圓的圓心軌跡為橢圓
數值滑桿
正三角形
Copy of 均分除法（分數÷整數）
Discover Topics
Cosine
Vectors 2D (Two-Dimensional)
Parabola
Matrices
Difference and Slope