1. 4(x/2-1/2)>=x/2+7
2. 5(x+5)>4(x+5)-(1-x)
好難~~~!!
數學問題(中四的)))急急~~~唔識做!!!!!!
2009-05-18 6:57 am
回答 (2)
2009-05-18 7:12 am
✔ 最佳答案
1. 4(x/2-1/2)>=x/2+7 2x-2>=x/2+7
4x-4>=x+14
3x>=18
x>=6
2. 5(x+5)>4(x+5)-(1-x)
x+5>-(1-x)
x+5>-1+x
沒有解
2009-05-18 7:18 am
4(x/2-1/2)>=x/2+7
2x-2>=x/2+7
1.5x>=7+2
x>=9/1.5
x>=6
5(x+5)>4(x+5)-(1-x)
5x+25>4x+20-1+x
5x-4x-x+25>20-1
25>19
No solution
2x-2>=x/2+7
1.5x>=7+2
x>=9/1.5
x>=6
5(x+5)>4(x+5)-(1-x)
5x+25>4x+20-1+x
5x-4x-x+25>20-1
25>19
No solution
收錄日期: 2021-04-23 20:37:20
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090517000051KK02326