题目内容
化简
÷
的结果是( )
2 |
x2-1 |
1 |
x-1 |
A.
| B.
| C.
| D.2(x+1) |
原式=
×(x-1)
=
,
故选:C.
2 |
(x-1)(x+1) |
=
2 |
x+1 |
故选:C.
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题目内容
2 |
x2-1 |
1 |
x-1 |
A.
| B.
| C.
| D.2(x+1) |
2 |
(x-1)(x+1) |
2 |
x+1 |