题目内容
化简:
(1)
+
(2)(1+
)÷
.
(1)
| x2 |
| x-1 |
| x |
| 1-x |
(2)(1+
| 4 |
| a2-4 |
| a |
| a-2 |
(1)原式=
-
=
=x;
(2)原式=
×
=
.
| x2 |
| x-1 |
| x |
| x-1 |
=
| x(x-1) |
| x-1 |
=x;
(2)原式=
| a2 |
| (a-2)(a-2) |
| a-2 |
| a |
=
| a |
| a+2 |
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