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ΣΣk=1+3+6+
Author:
Bunryu Kamimura
∑k(k-1)=(n-1)n(n+1)/3を使う。
GeoGebra
New Resources
standingwave-reflection-free
サイクロイド
二次曲線と離心率
直線の軌跡
接点の作る円は内接円
Discover Resources
テオ・ヤンセン機構2
比例の式と表、グラフ(基礎編)
陰関数03-02
特別な三角比
standingwave-reflection-free
Discover Topics
Geometric Mean
Indefinite Integral
Random Variables
Poisson Distribution
Perimeter