题目内容
计算:
(1)27
-2log23•log2
+lg4+2lg5
(2)log225•log34•log59.
(1)27
| 2 |
| 3 |
| 1 |
| 8 |
(2)log225•log34•log59.
(1)原式=33×
-3×log22-3+lg22+2lg5=9+9+2(lg2+lg5)=20.
(2)原式=
•
•
=8.
| 2 |
| 3 |
(2)原式=
| 2lg5 |
| lg2 |
| 2lg2 |
| lg3 |
| 2lg3 |
| lg5 |
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