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(1)解分式方程:x−22x−1+1=1.51−2x;(2)先化简,再求值:(1x+1+x2−2x+1x2−1)÷x−1x+1,其中x=2.

题目详情
(1)解分式方程:
x−2
2x−1
+1=
1.5
1−2x

(2)先化简,再求值:(
1
x+1
+
x2−2x+1
x2−1
x−1
x+1
,其中x=2.
x−2
2x−1
+1=
1.5
1−2x

(2)先化简,再求值:(
1
x+1
+
x2−2x+1
x2−1
x−1
x+1
,其中x=2.
x−2
2x−1
x−2x−22x−12x−1
1.5
1−2x
1.51.51−2x1−2x
(
1
x+1
+
x2−2x+1
x2−1
x−1
x+1
,其中x=2.
1
x+1
11x+1x+1
x2−2x+1
x2−1
x2−2x+1x2−2x+1x2−2x+1x2−2x+12−2x+1x2−1x2−1x2−1x2−12−1
x−1
x+1
x−1x−1x+1x+1
▼优质解答
答案和解析
(1)方程变形得:x−22x−1+1=-1.52x−1,去分母得:x-2+2x-1=-1.5,解得:x=0.5,经检验x=0.5是增根,原分式方程无解;(2)原式=[1x+1+(x−1)2(x+1)(x−1)]•x+1x−1=x−1+(x−1)2(x+1)(x−1)•x+1x−1=x(x−1)(x...