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Function: require_once

수학동아 - 폴리매스
본문바로가기
함께 풀고 싶은 문제
창의력을 기를 수 있는 수학 문제 또는 퍼즐을 내는 곳입니다.
[창의 퍼즐] 매우매우매우매우쉬운문제
K→C≡N 2019.10.06 04:05 조회 425
문제 푼 사람 1명
공유하기
페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

\pi는 x2+ax+9=0의 작은 근일때,

\pi가 유리수가 되게 하는 a의 범위를 구하여라.

이 문제 어떠셨나요?

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어려워요

0

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댓글 16
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  •  
    H2O 물 Lv.5 2019.10.06 04:34

    음...안배운것도 많은데 이걸 쉽다고...하면...저희는 뭐가되는거죠...?ㅠ

    댓글 작성하기 좋아요0 댓글수3
    •  
      집돌이 페렐만 Lv.9 2019.10.06 04:35

      괜찮아요~ 그럴 수 있어요~

      원래 다 그래요~

      좋아요0
    •  
      K→C≡N Lv.11 2019.10.06 04:44

      강한 긍정은 부정을 나타내는 경우가 많습니다.

      지금처럼요

      좋아요0
    •  
      H2O 물 Lv.5 2019.10.06 04:46

      네네..ㅠ 다른분들이 풀길..

      좋아요0
  •  
    디듀우 Lv.7 2019.10.06 05:09

    파이는 문자입니까 원주율입니까?

    댓글 작성하기 좋아요0 댓글수2
    •  
      K→C≡N Lv.11 2019.10.06 05:13

      문자입니다.

      좋아요0
    •  
      디듀우 Lv.7 2019.10.06 05:18

      생각해보니 원주율은 초월수라 근이 못되네요...

      좋아요0
  •  
    디듀우 Lv.7 2019.10.06 05:17 비밀댓글
    확인요청중
    비밀 댓글이 등록 되었습니다.
    댓글 작성하기 댓글수1
    •  
      K→C≡N Lv.11 2019.10.06 05:19 비밀댓글
      비밀 댓글이 등록 되었습니다!
  •  
    디듀우 Lv.7 2019.10.06 05:24 비밀댓글
    확인요청중
    비밀 댓글이 등록 되었습니다.
    댓글 작성하기 댓글수3
    •  
      K→C≡N Lv.11 2019.10.06 05:29 비밀댓글
      비밀 댓글이 등록 되었습니다!
    •  
      디듀우 Lv.7 2019.10.06 05:44

      그러면 더 이상 범위라 할 수 없는 것 아닌가요? 아니면 그 형태를 표현해야 되나요? 유리수 c에 대해 a=c+9/c여야 합니다. 그런데 이 수는 범위로 나타낼 수 없습니다.

      좋아요0
    •  
      K→C≡N Lv.11 2019.10.06 06:48

      이러면 저는 비밀댓글이 안보여요

      좋아요0
  •  
    21세기오일러 Lv.11 2019.10.06 06:46 비밀댓글
    확인요청중
    비밀 댓글이 등록 되었습니다.
    댓글 작성하기 댓글수1
    •  
      K→C≡N Lv.11 2019.10.06 06:47 비밀댓글
      비밀 댓글이 등록 되었습니다!
  •  
    해결
    Horizontal Lv.5 2019.10.15 01:37 비밀댓글
    비밀 댓글이 등록 되었습니다.
    댓글 작성하기 댓글수0
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