题目内容
(1)计算:-0.25×(
)2-(
)0×(tan60°)+|1-
|;
(2)化简:
÷
(x>
).
| 1 |
| 2 |
| π |
| 2 |
| 3 |
(2)化简:
| ||
| 2x2-x |
| 1 |
| x |
| 1 |
| 2 |
(1)原式=-
×
-1×
+
-1,(2分)
=-
-
+
-1,(3分)
=-
;(4分)
(2)∵x>
,
∴2x-1>0,
∴原式=
•x(2分)
=
•x(3分)
=1(4分).
| 1 |
| 4 |
| 1 |
| 4 |
| 3 |
| 3 |
=-
| 1 |
| 16 |
| 3 |
| 3 |
=-
| 17 |
| 16 |
(2)∵x>
| 1 |
| 2 |
∴2x-1>0,
∴原式=
| ||
| x(2x-1) |
=
| 2x-1 |
| x(2x-1) |
=1(4分).
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