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相向而行的兩行進波
Author:
ipc Wang
f(x,t)=sin(3x-2t) g(x,t)=sin(3x+2t)
GeoGebra
New Resources
柱體建築師
兩組對邊相等的四邊形
三位數除以一位數（二）
兩位數加法
兩位數除以一位數（二）
Discover Resources
S5 geometry
不盡相異物的排列
平移指令
P.4對稱
傅里叶级数 Fourier series
Discover Topics
Polynomial Functions
Pythagoras or Pythagorean Theorem
General Quadrilateral
Multiplication
Rectangle