题目内容
计算题x
(1)(
)-1+(
)0-|
-5|
(2)
+
.
(1)(
| 1 |
| 4 |
| 5 |
| 2 |
(2)
| 2 |
| x2-1 |
| 1 |
| x+1 |
(1)原式=4+1-(5-
)=
;
(2)原式=
+
=
=
.
| 2 |
| 2 |
(2)原式=
| 2 |
| (x+1)(x-1) |
| x-1 |
| (x+1)(x-1) |
| x+1 |
| (x+1)(x-1) |
| 1 |
| x-1 |
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