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二次函数y=ax²（a＞0)
Author:
吕胜
GeoGebra
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找出對稱軸
第八周作业
異分母分數減法
判斷球體
兩位數加法
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圖形縮放展示
田中的道路1
test
圆的面积 - 洋葱法
莱洛三角形的互滚
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Algebra
Geometric Distribution
Trapezoid
Functions
Limits