题目内容
(1)计算:-22+(
)0+2sin30°
(2)化简:
÷(x-
)
| 1 | ||
|
(2)化简:
| x-1 |
| x |
| 1 |
| x |
(1)-22+(
)0+2sin30°
=-4+1+1
=-2;
(2)
÷(x-
)
=
•
=
.
| 1 | ||
|
=-4+1+1
=-2;
(2)
| x-1 |
| x |
| 1 |
| x |
=
| x-1 |
| x |
| x |
| (x+1)(x-1) |
=
| 1 |
| x+1 |
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