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Function: driver
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Cacher.php
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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
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Line: 22
Function: driver
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Cacher.php
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Function: initiateCache
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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Function: model
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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Line: 559
Function: get_footer
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Line: 315
Function: require_once
수학동아 - 폴리매스
함께 풀고 싶은 문제
창의력을 기를 수 있는 수학 문제 또는 퍼즐을 내는 곳입니다.
켋
2020.03.03 05:27
조회 529
오일러 프로젝트 6번 문제입니다.
1부터 100까지의 수의 '합의 제곱'과 '제곱의 합'의 차는 얼마인가?
즉, (1^2+2^2+3^2+...+100^2)-(1+2+3+...+100)^2은 얼마인가?
원래 컴퓨터로 푸는 문제들이긴 하지만 유난히 직접 풀수 있을것 같은 문제입니다
마찬가지로 프로그램 코드 역시 풀이로 인정됩니다.
물론 이 친구의 경우는 직접계산도 계산기가 있으면 할만합니다. 저는 직접 계산했습니다.
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켋
Lv.7
2020.03.03 05:37
비밀댓글
비밀 댓글이 등록 되었습니다!
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아아 시그마 k^2는 n(n+1)(2n+1)/6을 이용하셨구나
사실 계산기가 더 빠르기도 하겠지만 걍 익숙한대로..ㅋㅋ
좋아요0
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켋
Lv.7
2020.03.03 05:40
어차피 컴퓨터가 노가다하지 리튬님은 모니터 앞에 앉아서 쉬지 않습니까 ㅋㅋ
좋아요0
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켋
Lv.7
2020.03.03 05:38
좋아요0
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아인수타인
Lv.12
2020.03.03 06:44
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로보카폴리
Lv.11
2020.03.17 00:08
비밀댓글
확인요청중
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켋
Lv.7
2020.03.17 02:52
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켋
Lv.7
2020.03.19 02:24
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비밀 댓글이 등록 되었습니다!
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