수학동아 - 폴리매스

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함께 풀고 싶은 문제

창의력을 기를 수 있는 수학 문제 또는 퍼즐을 내는 곳입니다.

[창의 퍼즐] [기하+대수]형상수의 값은?

수학자p 2020.09.03 18:42 조회 565

문제 푼 사람 0명

페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

형상수란 삼각수, 사각수, 오각수등을 포함하며 각 수는 삼각형, 사각형, 오각형을 만들기 위해 사용된 물체의 개수이다. 예를 들어, 삼각수는 1,3,6,10.....이다. a번째 b각수를 구할 수 있는 공식이 존재할까? 존재한다면 공식을 증명하여라.(그림은 오각수)

이전글 [벡터] 벌들의 이동

다음글 함수 2-1 경시출제문제

이 문제 어떠셨나요?

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황금 열쇠 Lv.7 2020.09.03 19:09

점화식도 되나요

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- 수학자p Lv.4 2020.09.03 19:17
  
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