题目内容
计算或化简:
(1)
-(
+1)0-
+|-5|-sin30°
(2)
÷(x-
)
(1)
1 | ||
|
3 |
8 |
(2)
x-1 |
x |
2x-1 |
x |
(1)原式=
+1-1-2
+5-
=
-
;
(2)原式=
÷
=
•
=
.
2 |
2 |
1 |
2 |
=
9 |
2 |
2 |
(2)原式=
x-1 |
x |
x2-2x+1 |
x |
=
x-1 |
x |
x |
(x-1)2 |
=
1 |
x-1 |
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