题目内容
规定“*”表示一种运算,且a*b=
,则4*(-
)=______.
| a-2b |
| ab |
| 1 |
| 2 |
原式=
=
=-
.
故答案是:-
.
4-2×(-
| ||
4×(-
|
=
| 4+1 |
| -2 |
=-
| 5 |
| 2 |
故答案是:-
| 5 |
| 2 |
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题目内容
| a-2b |
| ab |
| 1 |
| 2 |
4-2×(-
| ||
4×(-
|
| 4+1 |
| -2 |
| 5 |
| 2 |
| 5 |
| 2 |