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練習－由一元二次方程判別根的數目
Author:
Lau Sir
GeoGebra
New Resources
找出對稱軸
【案例】2018年全国1卷理科12题
三位數除以一位數（二）
球体的体积推导
畫出對稱圖形
Discover Resources
材料
三角函數
for 學姊
以 Unit Circle 了解 Sine 的正/負的副本
不信你能過 1
Discover Topics
Curve Sketching
Derivative
Conic Sections
Multiplication
Difference and Slope