수학동아 - 폴리매스

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함께 풀고 싶은 문제

나도 수학쌤 문장제 문제를 변형해 문제를 내는 곳입니다.

[문장제 문제&개념응용] [조합]점화식 문제

짱수학천재 2021.01.28 08:46 조회 512

문제 푼 사람 1명

페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

1,2,3,4,5,6으로만 숫자를 채워야하는 n자리수가 있다(ex:2341563,234)

여기서, n자리수를 만드는 경우의 수 중 1,2,3,4,5가 2번 연속하면 안되는 경우의 수를 $a_{n}$ 이라고 할때, $a_{n}$ 의 점화식을 구하시오.

(정말 오랜만에 문제를 내요... 많은 참여 부탁드립니다!!)

이전글 말과 당나귀

다음글 부등한 부등식

이 문제 어떠셨나요?

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도전

원파 Lv.9 2021.01.28 08:53 비밀댓글

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- 짱수학천재 Lv.7 2021.01.28 08:56
  
  죄송해요.. 제가 문제를 잘못 냈네요,....
  
  앞으로는 다시는 이런 실수 안 할 게요..
  
  수정 완료 했습니다!!
  
  좋아요0
해결

도전

원파 Lv.9 2021.01.28 08:58 비밀댓글

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- 짱수학천재 Lv.7 2021.01.28 09:02 비밀댓글
  
  비밀 댓글이 등록 되었습니다!
원파 Lv.9 2021.01.28 09:06 비밀댓글

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- 짱수학천재 Lv.7 2021.01.28 09:08
  
  네!!!!
  
  좋아요0

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