题目内容
(a
b
)(-3a
b
)=
| 2 |
| 3 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
-3a
.
| 6 | ab5 |
-3a
.
.| 6 | ab5 |
分析:直接利用有理指数幂的运算性质,化简求解即可.
解答:解:(a
b
)(-3a
b
)=-3a
+
b
+
=-3a
b
=-3a
.
故答案为:-3a
.
| 2 |
| 3 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 2 |
| 3 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 7 |
| 6 |
| 5 |
| 6 |
| 6 | ab5 |
故答案为:-3a
| 6 | ab5 |
点评:本题是基础题,考查有理指数幂的运算性质,考查计算能力.
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化简(a
b
)(-3a
b
)÷(
a
b
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| 3 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 6 |
| 5 |
| 6 |
| A、6a |
| B、-a |
| C、-9a |
| D、9a2 |