解下列方程:
NO.1
a+1/2a=3
NO.2
5/4t+3=3/4t
要步驟.
無限THX
F.1數 THXTHX
2007-10-13 5:48 am
回答 (5)
2007-10-13 5:55 am
✔ 最佳答案
NO.1a+1/2a=3
a+1=3X2a
a+1=6a
6a-a=1
5a=1
a=1/5
NO.2
5/4t+3=3/4t
左邊通分母
(5+12t)/4t=3/4t
5+12t=3
12t=3-5
12t=-2
t=-1/6
2007-10-13 7:04 am
NO1
因為aX1/2=1a/2 所以1/2a=a/2
a+a/2=3
a+a=3x2
2a=6
a=6/2
a=3
NO2
5t/4+3=3t/4
5t/4=3t/4-3
5t=4(3t/4-3)
5t=3t-12
5t-3t=-12
2t=-12
t=-12/2
t=-6
因為aX1/2=1a/2 所以1/2a=a/2
a+a/2=3
a+a=3x2
2a=6
a=6/2
a=3
NO2
5t/4+3=3t/4
5t/4=3t/4-3
5t=4(3t/4-3)
5t=3t-12
5t-3t=-12
2t=-12
t=-12/2
t=-6
參考: 自己計的 希望幫到你
2007-10-13 6:01 am
no.1
a+1/2a=3
1又1/2a=3
2/3a×2/3=3×2/3
a=2
no.2
5/4t+3=3/4t
5/4t+3=3/4t-5/4t
3=-1/2t
3×2/1=1/2t×2/1
6=t
t=6
我都係f1~~
a+1/2a=3
1又1/2a=3
2/3a×2/3=3×2/3
a=2
no.2
5/4t+3=3/4t
5/4t+3=3/4t-5/4t
3=-1/2t
3×2/1=1/2t×2/1
6=t
t=6
我都係f1~~
參考: 自己
2007-10-13 6:01 am
1. a+1/2a=3
3/2a=3
a=3*(2/3)
a=2
2. 5/4t+3=3/4t
5/4t-3/4t=-3
2/4t=-3
t=-3*(4/2)
t=-12/2
t=-6
2007-10-12 22:07:33 補充：
希望能夠幫到You!
3/2a=3
a=3*(2/3)
a=2
2. 5/4t+3=3/4t
5/4t-3/4t=-3
2/4t=-3
t=-3*(4/2)
t=-12/2
t=-6
2007-10-12 22:07:33 補充：
希望能夠幫到You!
參考: myself
2007-10-13 5:57 am
NO.1
a + 1/2a = 3
2a + a =(3)2 (2 sides * 2)
3a =6
a=2
NO.2
5/4t + 3 =3/4 t
5t+(3)4 = 3t (2 sides * 4)
5t- 3t = -12
2t= -12
t=-6
a + 1/2a = 3
2a + a =(3)2 (2 sides * 2)
3a =6
a=2
NO.2
5/4t + 3 =3/4 t
5t+(3)4 = 3t (2 sides * 4)
5t- 3t = -12
2t= -12
t=-6
參考: Me
收錄日期: 2021-05-01 18:40:14
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071012000051KK03761