题目内容
请以下列三个代数式中任选两个构造一个分式,并化简该分式.
a2-1;ab-b;b+ab.
a2-1;ab-b;b+ab.
本题共有六种答案,只要给出其中一种答案,均正确.
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| a2-1 |
| ab-b |
| (a+1)(a-1) |
| b(a-1) |
| a+1 |
| b |
| a2-1 |
| b+ab |
| (a+1)(a-1) |
| b(1+a) |
| a-1 |
| b |
| ab-b |
| a2-1 |
| b(a-1) |
| (a+1)(a-1) |
| b |
| a+1 |
| ab-b |
| b+ab |
| b(a-1) |
| (a+1)b |
| a-1 |
| a+1 |
| b+ab |
| a2-1 |
| b(a+1) |
| (a+1)(a-1) |
| b |
| a-1 |
| b+ab |
| ab-b |
| b(1+a) |
| b(a-1) |
| a+1 |
| a-1 |
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