2x+5y+3=0 10x+25y-15=0 互相聯立的解為何?
回答 (3)
2015-08-30 10:56 am
✔ 最佳答案
2x+5y+3=0，10x+25y－15=0 互相聯立的解為何?Sol
2x+5y+4=0
5(2x+5y+4)=0
10x+25y+20=0
與10x+25y－15=0矛盾
無解
2015-08-30 5:43 pm
2x + 5y + 3 = 0
=> 10x + 25y + 15 = 0...(a)
10x + 25y -15 = 0...(b)
(a) - (b) => 30 = 0
故此題x, y都無解
=> 10x + 25y + 15 = 0...(a)
10x + 25y -15 = 0...(b)
(a) - (b) => 30 = 0
故此題x, y都無解
參考: 自己
2016-03-17 3:06 am
2x+5y+4=0
5(2x+5y+4)=0
10x+25y+20=0
與10x+25y－15=0矛盾
無解
5(2x+5y+4)=0
10x+25y+20=0
與10x+25y－15=0矛盾
無解
收錄日期: 2021-04-18 00:10:50
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