题目内容
计算
+
-
-
.
| x+4 |
| x+1 |
| x-2 |
| x-3 |
| x+2 |
| x-1 |
| x+4 |
| x+3 |
考点:分式的加减法
专题:
分析:先化简算式,再通分运用分式的加减法则运算.
解答:解:
+
-
-
=1+
+1+
-1-
-1-
=
-
+
-
=
+
=
.
| x+4 |
| x+1 |
| x-2 |
| x-3 |
| x+2 |
| x-1 |
| x+4 |
| x+3 |
=1+
| 3 |
| x+1 |
| 1 |
| x-3 |
| 3 |
| x-1 |
| 1 |
| x+3 |
=
| 3 |
| x+1 |
| 3 |
| x-1 |
| 1 |
| x-3 |
| 1 |
| x+3 |
=
| -6 |
| (x+1)(x-1) |
| 6 |
| (x+3)(x-3) |
=
| 48 |
| (x+1)(x-1)(x+3)(x-3) |
点评:本题主要考查了分式的加减法,解题的关键是简化算式,再通分.
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