수학동아 - 폴리매스

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함께 풀고 싶은 문제

창의력을 기를 수 있는 수학 문제 또는 퍼즐을 내는 곳입니다.

[창의 퍼즐] [정수/대수]광곽 시험 복기한 거

△π 2020.06.27 03:28 조회 585

문제 푼 사람 0명

페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

(1)n의 각 자릿수의 곱이 n^2-10n+36이라고 한다. n의 값을 모두 구하여라.

(2) $\sqrt{a-1}+\sqrt{b-4}+\sqrt{c-9}+\sqrt{d-16}=\frac{a+b+c+d}{2}$ 을 만족하는 실수 a,b,c,d 값을 모두 구하여라.

(3)1/9+1/99+1/999+...+1/999...999(9가 2021개)에서 소수 71번째 자리 수를 구하여라.

이전글 [조합] 삼각파이 진열대

다음글 [기하] 여기도 수선, 저기도 수선!

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