题目内容
计算:
(1)(
-π)0-2-3+(
)-1
(2)
÷
+
.
(1)(
| 2 |
| 1 |
| 5 |
(2)
| x-2 |
| x2-1 |
| 2x+2 |
| x2+2x+1 |
| 1 |
| x-1 |
(1)原式=1-
+5
=6-
=
;
(2)原式=
×
+
=
+
=
=
.
| 1 |
| 8 |
=6-
| 1 |
| 8 |
=
| 47 |
| 8 |
(2)原式=
| x-2 |
| (x+1)(x-1) |
| (x+1)2 |
| 2(x+1) |
| 1 |
| x-1 |
=
| x-2 |
| 2(x-1) |
| 1 |
| x-1 |
=
| x-2+2 |
| 2(x-1) |
=
| x |
| 2(x-1) |
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