Math........
回答 (3)
2007-01-21 1:31 am
✔ 最佳答案
5/(2m)=1/(2m+3m)5/(2m)=1/(5m)
2m=25m (Cross-multiply)
25m-2m=0
23m=0
m=0
But it will make the denominator of fractions 5/(2m) and 1/(2m+3m) equal to zero, therefore this equation has no solution.
2007-01-21 18:41:20 補充：
I think many people will forget to determine if the solution is acceptable.
2007-01-20 11:41 pm
5/2m=1/2m+3m
5/2m=1/5m
5*1/1=5m*2m/1
5=10m2
m2=5*1/10
m=1/2*2/1
m=1
5/2m=1/5m
5*1/1=5m*2m/1
5=10m2
m2=5*1/10
m=1/2*2/1
m=1
參考: me
2007-01-20 11:39 pm
5/(2m)=1/(2m+3m)
5 = [1/(2m+3m)] × (2m)
5=2m / 5m
25m = 2m
m = 0
5 = [1/(2m+3m)] × (2m)
5=2m / 5m
25m = 2m
m = 0
收錄日期: 2021-04-23 19:22:42
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070120000051KK02483