题目内容
化简:
÷(1+
)=______.
| a2-1 |
| a |
| 1 |
| a |
简:
÷(1+
)
=
÷
=
×
=a-1
故答案为:a-1
| a2-1 |
| a |
| 1 |
| a |
=
| a2-1 |
| a |
| a+1 |
| a |
=
| (a+1)(a-1) |
| a |
| a |
| a+1 |
=a-1
故答案为:a-1
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题目内容
| a2-1 |
| a |
| 1 |
| a |
| a2-1 |
| a |
| 1 |
| a |
| a2-1 |
| a |
| a+1 |
| a |
| (a+1)(a-1) |
| a |
| a |
| a+1 |