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수학동아 - 폴리매스
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[수학 정보] 몇가지 꼭 필요한 공식(그리 쓸모있지는 않음)
PF＿ 2021.02.28 06:24 조회 712
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페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

(a) 기초공식

(a-1) 등호 기본공식: x=y, y=z, x=z

(a-2) 덧셈에 교환법칙: x+y=y+x

(a-3) 덧셈과 뺄셈의 관계식: x+y=z, z-y=x, z-x=y

(a-4) 곱셈의 교환법칙: x*y=y*x

(a-5) 곱셈과 나눗셈의 관계식: x*y=z, z/y=x, z/x=y

(b) 심화공식

(b-6) 곱셈의 분배법칙: 괄호 풀기: (x+y)*z= x*z+y*z

(b-7) 곱셈의 분배법칙: 괄호 묶기: x*y+x*z=x*(y+z)

(b-8) 제곱 기본공식: xy= x*x*x*x*x...(x를 y번 곱한 수)

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  •  
    원파 Lv.9 2021.03.03 05:27

    댓글 작성하기 좋아요0 댓글수0
  •  
    황냥이 Lv.5 2021.03.03 22:07

    왜 다 이름이 파이야 ㅋㅋ

    댓글 작성하기 좋아요0 댓글수1
    •  
      PF＿ Lv.8 2021.03.08 05:58

      그게 유행이라서요.

      어떤 분들은 너무 친목질같다고도 하는데 저는 괜찮을 것 같네요.

      (파이로 끝나는 이름 추천합니다: 황냥파이)

      좋아요0
  •  
    파이=숫자 Lv.2 2021.03.21 21:34

    응애 나 아기 수올러

    정의역 줘

    댓글 작성하기 좋아요0 댓글수1
    •  
      PF＿ Lv.8 2021.03.21 21:34

      하지마세요이제세번만더그러면기자님들께이메일을보내겠습니다

      좋아요0
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