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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:
+1=
;
(2)先化简,再求值:(
+
)÷
,其中x=2.
+1=
;
(2)先化简,再求值:(
+
)÷
,其中x=2.
x−2 x−2 2x−1 2x−1
1.5 1.5 1−2x 1−2x
(
+
)÷
,其中x=2.
1 1 x+1 x+1
x2−2x+1 x2−2x+1 x2−2x+1x2−2x+12−2x+1x2−1 x2−1 x2−1x2−12−1
x−1 x−1 x+1 x+1
| x−2 |
| 2x−1 |
| 1.5 |
| 1−2x |
(2)先化简,再求值:(
| 1 |
| x+1 |
| x2−2x+1 |
| x2−1 |
| x−1 |
| x+1 |
| x−2 |
| 2x−1 |
| 1.5 |
| 1−2x |
(2)先化简,再求值:(
| 1 |
| x+1 |
| x2−2x+1 |
| x2−1 |
| x−1 |
| x+1 |
| x−2 |
| 2x−1 |
| 1.5 |
| 1−2x |
(
| 1 |
| x+1 |
| x2−2x+1 |
| x2−1 |
| x−1 |
| x+1 |
| 1 |
| x+1 |
| x2−2x+1 |
| x2−1 |
| x−1 |
| x+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...
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