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拋物線2--焦點法
Author:
16楊杰
GeoGebra
New Resources
空间中两直线的位置关系
斜率的值
三位數除以一位數（二）
垂直線的斜率
多邊形的面積
Discover Resources
ABC 1
圓內接四邊形對角
speed
彩色立体方阵、点阵
完全图
Discover Topics
Geometry
Hypothesis Testing
Mathematics
Trigonometric Functions
Optimization Problems