题目内容
计算:
(1)loga2+loga
(a>0且a≠1);
(2)(2a
b
)(-6a
b
)÷(-3a
b
);
(3)
.
(1)loga2+loga
| 1 |
| 2 |
(2)(2a
| 2 |
| 3 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 6 |
| 5 |
| 6 |
(3)
a
|
(1)原式=loga(2×
)=loga1=0.
(2)原式=[2×(-6)÷3]•a(
+
-
)•b(
+
-
)=4a.
(3)原式=
=
=
=
.
| 1 |
| 2 |
(2)原式=[2×(-6)÷3]•a(
| 2 |
| 3 |
| 1 |
| 2 |
| 1 |
| 6 |
| 1 |
| 2 |
| 1 |
| 3 |
| 5 |
| 6 |
(3)原式=
a
|
a
|
a
|
| a |
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