初一数学

显示全部楼层 · 2009-6-7 11:17:00

1/(x-2)+3=-(1-x)/(2-x)
解方程

千问 · 2009-6-7 11:17:00

1/(x-2)+3=-(1-x)/(2-x)解：右式变化得
1/(x-2)+3=(1-x)/(x-2) 两边都×(x-2)得
1-3(x-2)=1-x 化简移项得
x=3/2检验:将x-=3/2代入
左边=1/(3/2-2)+3
=2/(3-4)+3
=-2+3
=1
右边=-(1-3/2)/(2-3/2)
=-(2-3)/(4-3)
=1
左边=右边所以该方程的解为x=3/2...

千问 · 2009-6-7 11:17:00

解:1／（x-2)+3=(1-x)／(2-x)
1/(x-2)+3=(x-1)/(x-2)
1+3(x-2)=x-1
1+3x-6=x-1
3x-x=-1+6-1
2x=4
x=2
谢谢！！！希望对你有帮助！！☆＾＿＾☆！！...

千问 · 2009-6-7 11:17:00

原式=1+3X-6/X-2=1-X/2-X1+3X-6/X-2=X-1/X-22X=4 X=2...