已知 20K+20K-10L-V/2=130
5K=1L
10L=1V
V=?
maths(P.1)
2007-11-10 9:27 pm
回答 (3)
2007-11-10 9:50 pm
✔ 最佳答案
If 5K=1L and 10L=1Vthen 50K=10L=1V
所以
20K+20K-10L-V/2=130
20K+20K-50K-50K/2=130
-35K=130
K=(-)130/35
K=(-)26/7
5K=1L
L=(-)26X5/7
10L=1V
V=(-)26X5X10/7
V=(-)1300/7
2007-11-10 9:40 pm
20K+20K-10L-V/2=130------1
5K=1L
代入1
20k=2L
so:
2L+2L-10L-V/2=130----2
10L=1V(5L=0.5V)
代入2
4L-10L-5L=130
so:
-11L= 130
-11L=130=-1.1V
V=-118.18(1818181818181818181818181818181818............................................)
5K=1L
代入1
20k=2L
so:
2L+2L-10L-V/2=130----2
10L=1V(5L=0.5V)
代入2
4L-10L-5L=130
so:
-11L= 130
-11L=130=-1.1V
V=-118.18(1818181818181818181818181818181818............................................)
參考: me
2007-11-10 9:40 pm
係50k...因為呢..
20K+20K-10L-V/2
=40K-10L-V/2
又因為5K=1L...所以10L=50K...到之後LA..10L=1V而10L又同時係50K....所以V係50K
20K+20K-10L-V/2
=40K-10L-V/2
又因為5K=1L...所以10L=50K...到之後LA..10L=1V而10L又同時係50K....所以V係50K
收錄日期: 2021-04-23 22:30:44
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071110000051KK01800