80x + 640y ≥ 480
6x + 40y ≥ 30
580x + 1360y ≥ 1600
x ≥ 0
y ≥ 0
5 equations show on the one diagram
and useing the symbol ( /// or \\\ ) to denote the area
( if you can not denote the symbol, forget it )
Show the area on the diagram
2008-02-29 3:26 pm
回答 (1)
2008-02-29 8:00 pm
收錄日期: 2021-04-25 17:18:59
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080229000051KK00356