题目内容
计算:
(1)
-
(2)(1+
)÷(2x-
).
(1)
| 1 |
| x-1 |
| x |
| x2-1 |
(2)(1+
| 1 |
| x |
| 1+x2 |
| x |
(1)原式=
-
=
=
;
(2)原式=
÷
=
•
=
.
| x+1 |
| (x+1)(x-1) |
| x |
| (x+1)(x-1) |
=
| x+1-x |
| (x+1)(x-1) |
=
| 1 |
| x2-1 |
(2)原式=
| x+1 |
| x |
| 2x2-(1+x2) |
| x |
=
| x+1 |
| x |
| x |
| (x+1)(x-1) |
=
| 1 |
| x-1 |
练习册系列答案
相关题目