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单调区间求参数
Author:
孟洪刚
GeoGebra
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兩組對邊相等和有直角的四邊形
画直线等分三角形的面积
找出對稱軸
兩位數除以一位數（一）
GeoGebra笔记功能体验课件
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math
http://www.qsir.org/?p=8853
sinx & cscx
數位學習社103 12 15
高中二年級向量的副本
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Secant Line or Secant
Optimization Problems
Trigonometric Functions
Quadrilaterals
Random Variables