题目内容
计算
(1)
+(
)-
-π0
(2)lg
-lg
+lg12.5-log89•log98.
(1)
|
| 27 |
| 64 |
| 1 |
| 3 |
(2)lg
| 1 |
| 2 |
| 5 |
| 8 |
(1)满分(6分)
+(
)-
-π0
=[(
)2]
+[(
)3] -
-1
=
+
-1=2.
(2)满分(6分)
lg
-lg
+lg12.5-log89•log98
=lg(
×
×
)-
•
=lg10-1
=0.
|
| 27 |
| 64 |
| 1 |
| 3 |
=[(
| 5 |
| 3 |
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=
| 5 |
| 3 |
| 4 |
| 3 |
(2)满分(6分)
lg
| 1 |
| 2 |
| 5 |
| 8 |
=lg(
| 1 |
| 2 |
| 8 |
| 5 |
| 25 |
| 2 |
| lg9 |
| lg8 |
| lg8 |
| lg9 |
=lg10-1
=0.
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