math幾條問題(10分)

2008-07-14 5:47 am
1.solve the equation

1/x-3=1

2.solve the following inequalities.
(a)a+2>3

(b)3x-4<5

回答 (3)

2008-07-14 5:30 pm
✔ 最佳答案
1. solve the equation
1/x-3=1
1/x=4
4x=1
x=1/4=0.25
2. solve the following inequalities
(a) a+2>3
a>1
(b) 3x-4<5
3x<9
x<3
P.S. Equation & inequalities的一邊做了甚麼改變,另一邊也要同樣做法。Inequalities若乘了負數,>號(大於)就要變<號(小於),<號(小於)就要變>號(大於)。
2008-07-14 5:51 am
1) 1/x-3=1
1/x =4
x = 1/4

2a) a+2>3
a >1

2b) 3x-4<5
3x <9
x <3
2008-07-14 5:50 am
1) 1/X-3 =1
1/X =1+3
X = 1/4


2) a> 1


b) x<3

2008-07-13 21:51:12 補充:
2a) a+2>3
a >3-2
a > 1

b) 3x-4<5
3x <9
x <3
參考: ME


收錄日期: 2021-04-13 15:49:01
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080713000051KK02813

檢視 Wayback Machine 備份