解方程: (1)2/x=3/x+1; (2)1/x−2+3=1−x2−x; (3)1/x2+5x−6=1/x2+x+6.
问题描述:
解方程:
(1)
=2 x
;3 x+1
(2)
+3=1 x−2
;1−x 2−x
(3)
=1
x2+5x−6
. 1
x2+x+6
答
(1)去分母得:2(x+1)=3x,去括号得:2x+2=3x,移项合并得:-x=-2,解得:x=2,经检验x=2是原分式方程的解;(2)方程变形得:1x−2+3=x−1x−2,去分母得:1+3(x-2)=x-1,去括号得:1+3x-6=x-1,移项合并得:2...