maths~~~~~

2010-02-06 2:13 am

回答 (2)

2010-02-06 2:57 am
✔ 最佳答案




Sol

linear equation

=>( 2m-3n+2=0 or 2m-3n+2=1),(m/4-2n+6=0 or m/4-2n=6=1)

(1) 2m-3n+2=0,m/4-2n+6=0

2+3<>7 (不合)

(2) 2m-3n+2=0,m/4-2n+6=1

2m-3n+2=0,m-8n+24=4

2m-3n=-2,m-8n=-20

m=44/13,n=38/13



(3) 2m-3n+2=1,m/4-2n+6=0

2m-3n=-1,m-8n=-24

m=64/13,n=4713



(4) 2m-3n+2=1,m/4-2n+6=1

2m-3n=-1,m-8n=-20

m=4,n=3





2010-02-06 6:05 am
因這是二元方程,指數不可能是0,所以答案只可能是m=4,n=3


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