題目
令y成為公式5y=A(B-2y)的主項
令u成為公式=
a − b
------------
1-u − 1+u
跪求詳細步驟
請問主項變換是怎樣做?
2018-01-02 2:41 am
回答 (1)
2018-01-02 1:16 pm
✔ 最佳答案
(i)5y = A(B-2y)
5y = AB-2Ay
5y+2Ay = AB
y(5+2A) = AB
∴ y = AB/(5+2A)
____________________________________________________________________________
(ii)
A B
------- = --------
1 - U 1 + U
(1 + U) A = (1 - U) B
A + UA = B - UB
UA + UB = B - A
U(A + B) = B - A
B - A
∴ U = ----------
A + B
收錄日期: 2021-04-26 15:48:03
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20180101184102AAGhKYi