루트2=b/a(a와b는서로소인정수)일경우b를양변에곱하고양변을제곱하면2b제곱=a제곱인데좌변이짝수이므로a가짝수가되어a=2k 2b제곱=4k제곱 b제곱=2k제곱~!
[무물보AI] 답변 로딩중...