题目内容
计算:(
+
)÷(
-
)
1 |
x |
1 |
y |
1 |
x2 |
1 |
y2 |
原式=
÷
=
•
=
.
x+y |
xy |
y2-x2 |
x2y2 |
x+y |
xy |
x2y2 |
(y+x)(y-x) |
xy |
y-x |
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题目内容
1 |
x |
1 |
y |
1 |
x2 |
1 |
y2 |
x+y |
xy |
y2-x2 |
x2y2 |
x+y |
xy |
x2y2 |
(y+x)(y-x) |
xy |
y-x |