题目内容
化简分式:
+
+
.
| 1 |
| x2+3x+2 |
| 1 |
| x2+5x+6 |
| 1 |
| x2+7x+12 |
原式=
+
+
=(
-
)+(
-
)+(
-
)
=
-
=
.
| 1 |
| (x+1)(x+2) |
| 1 |
| (x+2)(x+3) |
| 1 |
| (x+3)(x+4) |
=(
| 1 |
| x+1 |
| 1 |
| x+2 |
| 1 |
| x+2 |
| 1 |
| x+3 |
| 1 |
| x+3 |
| 1 |
| x+4 |
=
| 1 |
| x+1 |
| 1 |
| x+4 |
=
| 3 |
| x2+5x+4 |
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