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二次函数y=ax²（a＞0)
Author:
吕胜
GeoGebra
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球体的体积推导（优化版）
柱體建築師
拼砌四邊形
【案例】2018年全国1卷理科12题
球體建築師
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分數除法2: p/q ÷ b（均分）
平行四邊形與三角形
端點在兩圓周線段中點軌跡
gjc090c23 圓內三角形與角度
目標函數
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Standard Deviation
Right Triangles
Linear Regression
Difference and Slope
Linear Functions