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ΣΣk=1+3+6+
Author:
Bunryu Kamimura
∑k(k-1)=(n-1)n(n+1)/3を使う。
GeoGebra
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目で見る立方体の2等分
standingwave-reflection-free
直線の軌跡
standingwave-reflection-fixed
等積変形2
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対応の図式から関数のグラフへ
三角関数の花
正八面体
待つ
円柱・角柱の体積
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Piecewise Functions
Division
Rectangle
Circle
Correlation