If a and b are integers and 12a = 25b, does 12 | b? does 25 | a? Explain.?
回答 (2)
2015-12-17 11:26 am
Yes. The prime factorization of the integer "12*a" must equal the prime factorization of the integer "25*b". When both have been fully factored, there will be two 2's and a 3 on the left, which must be duplicated on the right; and there will be two 5's on the right, which must be duplicated on the left.
2015-12-17 11:32 am
You don't have to keep asking this same question with different numbers. The concept and method of proof are exactly the same.
收錄日期: 2021-04-21 15:50:22
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20151217032355AAAViv2