x/a+x/b=1
呢條數係問個x係咩???
F.1數學...Literal Equations
2007-11-21 3:59 am
回答 (3)
2007-11-21 4:04 am
✔ 最佳答案
方法一：通分母x/a+x/b = 1
xb/ab + xa/ab = 1
(xb + xa)/ab = 1
xb + xa = ab
x(b+a) = ab
x = ab/(b+a)
方法一：全式乘ab
x/a+x/b = 1
ab(x/a+x/b) = ab
xb+xa = ab
x(b+a) = ab
x = ab/(b+a)
收錄日期: 2021-04-13 14:32:20
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071120000051KK03063