题目内容
计算:(1)(
-1)0+2sin30°+(
)2;
(2)
+
.
| 5 |
| 3 |
(2)
| 1 |
| x+1 |
| 2 |
| x2-1 |
(1)原式=1+1+3=5;
(2)原式=
+
=
=
.
(2)原式=
| 1 |
| x+1 |
| 2 |
| (x+1)(x-1) |
| x+1 |
| (x+1)(x-1) |
| 1 |
| x-1 |
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题目内容
| 5 |
| 3 |
| 1 |
| x+1 |
| 2 |
| x2-1 |
| 1 |
| x+1 |
| 2 |
| (x+1)(x-1) |
| x+1 |
| (x+1)(x-1) |
| 1 |
| x-1 |