题目内容
计算：(1-| 1 |
| a |
| 1 |
| a |
分析：首先利用分式的减法法则，求得括号里面的值，再利用除法法则求解即可求得答案．
解答：解：(1-
)÷(a-
)
=
÷
=
•
=
．
| 1 |
| a |
| 1 |
| a |
=
| a-1 |
| a |
| a2-1 |
| a |
=
| a-1 |
| a |
| a |
| (a+1)(a-1) |
=
| 1 |
| a+1 |
点评：此题考查了分式的混合运算．解题时要注意运算顺序．
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题目内容
计算：(1-| 1 |
| a |
| 1 |
| a |
| 1 |
| a |
| 1 |
| a |
| a-1 |
| a |
| a2-1 |
| a |
| a-1 |
| a |
| a |
| (a+1)(a-1) |
| 1 |
| a+1 |