Search
Google ClassroomGoogle Classroom
GeoGebraGeoGebra Classroom
GeoGebra
  • Home
  • Resources
  • Profile
  • Classroom
  • App Downloads

ΣΣk=1+3+6+

Author:Bunryu Kamimura

∑k(k-1)=(n-1)n(n+1)/3を使う。

New Resources

  • 正17角形 作図 regular 17-gon 2
  • standingwave-plus
  • サイクロイド
  • sine-wave
  • standingwave

Discover Resources

  • x^n-1=0の解
  • アステロイド
  • 正四角錐と内接球&外接球
  • 二次関数最大最小(定義域)
  • 三角関数のグラフ

Discover Topics

  • Multiplication
  • Ellipse
  • Integral Calculus
  • Intersection
  • Polynomial Functions
AboutPartnersHelp Centre
Terms of ServicePrivacyLicense
Graphing CalculatorCalculator SuiteMath Resources

Download our apps here:

Download_on_the_App_Store_Badge_US-UK_RGB_blk_4SVG_092917

© 2026 GeoGebra®