题目内容
计算:(x-
)÷(y-
)=______.
| 1 |
| y |
| 1 |
| x |
(x-
)÷(y-
)
=
÷
=
•
=
.
故答案为:
| 1 |
| y |
| 1 |
| x |
=
| xy-1 |
| y |
| xy-1 |
| x |
=
| xy-1 |
| y |
| x |
| xy-1 |
=
| x |
| y |
故答案为:
| x |
| y |
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计算(
-
)•(xy)的结果是( )
| 1 |
| x |
| 1 |
| y |
| A、x-y | B、x+y |
| C、y-x | D、-x-y |