If x and y are integers and 10x = 9y, does 10 | y? does 9 | x ? Explain.?
回答 (1)
2015-12-17 11:19 am
x = (9/10) y is an integer
Since 9 = 3*3 and 10 = 2*5, then the only way for this to be an integer is if 2 and 5 are factors of y.
Since 9 = 3*3 and 10 = 2*5, then the only way for this to be an integer is if 2 and 5 are factors of y.
收錄日期: 2021-04-21 15:49:42
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20151217031700AAm0v4K