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> 化简分式(y-2y+2-y+2y-2)•y2-2yy2,并选一个你喜欢的值代入求分式的值.-数学
化简分式(y-2y+2-y+2y-2)•y2-2yy2,并选一个你喜欢的值代入求分式的值.-数学
题目简介
化简分式(y-2y+2-y+2y-2)•y2-2yy2,并选一个你喜欢的值代入求分式的值.-数学
题目详情
化简分式
(
y-2
y+2
-
y+2
y-2
)•
y
2
-2y
y
2
,并选一个你喜欢的值代入求分式的值.
题型:解答题
难度:中档
来源:不详
答案
原式=
(y-2)
2
-
(y+2)
2
(y+2)(y-2)
•
y(y-2)
y
2
=-
class="stub"8
y+2
,
当y=1时,原式=-
class="stub"8
3
.
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题目简介
化简分式(y-2y+2-y+2y-2)•y2-2yy2,并选一个你喜欢的值代入求分式的值.-数学
题目详情
答案
=-
当y=1时,原式=-