题目内容
计算：a2-
-1．
| 1 |
| a+1 |
原式=
-
-
=
=
=
．
| a2(a+1) |
| a+1 |
| 1 |
| a+1 |
| a+1 |
| a+1 |
=
| a2(a+1)-1-(a+1) |
| a+1 |
=
| a3+a2-1-a-1 |
| a+1 |
=
| a3+a2-a-2 |
| a+1 |
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题目内容
| 1 |
| a+1 |
| a2(a+1) |
| a+1 |
| 1 |
| a+1 |
| a+1 |
| a+1 |
| a2(a+1)-1-(a+1) |
| a+1 |
| a3+a2-1-a-1 |
| a+1 |
| a3+a2-a-2 |
| a+1 |