题目内容
(1)计算:
-|-1|+(
)-3-4cos30°
(2)化简.(
-
)÷
.
| 12 |
| 1 |
| 2 |
(2)化简.(
| x+1 |
| x |
| x |
| x-1 |
| 1 |
| (x-1)2 |
(1)原式=2
-1+8-2
=7;
(2)原式=
×(x-1)
=
.
故答案为:7,
.
| 3 |
| 3 |
=7;
(2)原式=
| x2-1-x2 |
| x(x-1) |
=
| 1-x |
| x |
故答案为:7,
| 1-x |
| x |
练习册系列答案
相关题目