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> 11+a-1a-1+2-1-a2+-4a2a4+1=______.-数学
11+a-1a-1+2-1-a2+-4a2a4+1=______.-数学
题目简介
11+a-1a-1+2-1-a2+-4a2a4+1=______.-数学
题目详情
1
1+a
-
1
a-1
+
2
-1-
a
2
+
-4
a
2
a
4
+1
=______.
题型:填空题
难度:偏易
来源:不详
答案
原式=
class="stub"1
a+1
-
class="stub"1
a-1
-
class="stub"2
a
2
+1
-
4
a
2
a
4
+1
=
class="stub"-2
a
2
-1
-
class="stub"2
a
2
+1
-
4
a
2
a
4
+1
=
-4
a
2
a
4
-1
-
4
a
2
a
4
+1
=
-
8
a
6
a
8
-1
,
故答案为
-
8
a
6
a
8
-1
.
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题目简介
11+a-1a-1+2-1-a2+-4a2a4+1=______.-数学
题目详情
答案
=
=
=-
故答案为-