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