题目内容
计算化简:
(1)|-4|+(-1)2009-(
)-2+(
)0
(2)(x+1-
)÷
.
(1)|-4|+(-1)2009-(
| 1 |
| 2 |
| π |
(2)(x+1-
| 15 |
| x-1 |
| x-4 |
| x-1 |
(1)原式=4-1-4+1…(3分)
=0;…(5分)
(2)原式=(
-
)•
=
•
…(3分)
=
•
…(4分)
=x+4.…(5分)
=0;…(5分)
(2)原式=(
| x2-1 |
| x-1 |
| 15 |
| x-1 |
| x-1 |
| x-4 |
=
| x2-16 |
| x-1 |
| x-1 |
| x-4 |
=
| (x+4)(x-4) |
| x-1 |
| x-1 |
| x-4 |
=x+4.…(5分)
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