题目内容
计算:
(1)2 -
+
+
-
;
(2)log49-log212+10 -lg
.
(1)2 -
| 1 |
| 2 |
| (-4)0 | ||
|
| 1 | ||
|
(1-
|
(2)log49-log212+10 -lg
| 5 |
| 2 |
(1)2 -
+
+
-
=
+
+
=2
;
(2)log49-log212+10 -lg
=log23-log23-log24+
=-2+
=-
.
| 1 |
| 2 |
| (-4)0 | ||
|
| 1 | ||
|
(1-
|
| ||
| 2 |
| ||
| 2 |
| 2 |
| 2 |
(2)log49-log212+10 -lg
| 5 |
| 2 |
| 2 |
| 5 |
| 2 |
| 5 |
| 8 |
| 5 |
练习册系列答案
相关题目