唔識做呢題:
Make x the subject of the formula,
1/r = ax/x-1 + 1/s
(ans 係 s-r / s-r-ars)
希望可以show 埋d steps 出梨
因為我唔明點計!
thx!
f.2 Maths (Change the subject) 急!
2008-10-03 2:56 am
回答 (2)
2008-10-03 3:19 am
✔ 最佳答案
The answer is as follows:圖片參考：http://i277.photobucket.com/albums/kk75/uncle_michael/20081002_mat_1.jpg?t=1222946305
2008-10-03 11:05 pm
1/r = ax/(x-1) + 1/s
1/r = (asx + x - 1) / (s(x-1))
s(x-1) = r(asx + x - 1)
sx - s = arsx + rx - r
sx - rx - arsx = s-r
x(s-r-ars) = s-r
x = (s-r) / (s-r-ars)
1/r = (asx + x - 1) / (s(x-1))
s(x-1) = r(asx + x - 1)
sx - s = arsx + rx - r
sx - rx - arsx = s-r
x(s-r-ars) = s-r
x = (s-r) / (s-r-ars)
收錄日期: 2021-04-23 23:05:02
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20081002000051KK01468