题目内容
计算:
+
•
.
| 1 |
| 2x |
| 1 |
| x2-x |
| 1-x |
| 2 |
原式=
+
•
=
-
•
=
-
=0
| 1 |
| 2x |
| 1 |
| x(x-1) |
| 1-x |
| 2 |
=
| 1 |
| 2x |
| 1 |
| x(x-1) |
| x-1 |
| 2 |
=
| 1 |
| 2x |
| 1 |
| 2x |
=0
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题目内容
| 1 |
| 2x |
| 1 |
| x2-x |
| 1-x |
| 2 |
| 1 |
| 2x |
| 1 |
| x(x-1) |
| 1-x |
| 2 |
| 1 |
| 2x |
| 1 |
| x(x-1) |
| x-1 |
| 2 |
| 1 |
| 2x |
| 1 |
| 2x |