题目内容
计算下列各式的值
(1)4x
(-3x
y
)÷(-6x-
y
)
(2)log535+log
-log5
-log514.
(1)4x
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 3 |
| 1 |
| 2 |
| 2 |
| 3 |
(2)log535+log
| 1 |
| 2 |
| 2 |
| 1 |
| 50 |
(1)∵原式=[4×(-3)÷(-6)]x
+
+
•y
-
=2xy
;
(2)原式=log535-log2
+log550-log514
=-
+log5
=-
+log553
=-
+3=
.
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 2 |
| 1 |
| 3 |
| 2 |
| 3 |
| 1 |
| 3 |
(2)原式=log535-log2
| 2 |
=-
| 1 |
| 2 |
| 35×50 |
| 14 |
=-
| 1 |
| 2 |
=-
| 1 |
| 2 |
| 5 |
| 2 |
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