唔識做(make the subject of the formula) 請詳細解釋!
1) ax＋c =dx-b [x]
2) PV=1/3Nm(c嘅 二次方) [m]
3) 1/a+1/b= -2 [a] Thx!
有冇人可以幫我....F.2 maths (formula)
2008-11-02 4:06 pm
回答 (1)
2008-11-05 5:08 pm
✔ 最佳答案
1. ax + c = dx - bc + b = dx - ax
b + c = x(d - a)
x = (b + c) / (d - a)
2. PV = 1/3Nmc^2
3PV = Nmc^2
m = 3PV / (Nc^2)
3. 1/a + 1/b = -2
b + a = -2ab
a + 2ab = -b
a(1+2b) = -b
a = -b / (1+2b)
收錄日期: 2021-04-23 23:18:35
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20081102000051KK00347