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駐波:相向而行的兩行進波線性疊加而成
Author:
ipc Wang
y=sin(3x-2t) y=sin(3x+2t)
GeoGebra
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球体的体积推导
【案例】2018年全国1卷理科12题
兩組對邊相等和有直角的四邊形
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二次函数的值
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