问题
解答题
当a=2-
|
答案
原式=
-a(a-2) (a-2)2 (a-1)2 a-1
=
-a(a-2) |a-2|
,|a-1| a-1
∵a=2-
<1,3
∴原式=
-a(a-2) -(a-2) -(a-1) a-1
=-a+1
=-(2-
)+13
=
-1.3
当a=2-
|
原式=
-a(a-2) (a-2)2 (a-1)2 a-1
=
-a(a-2) |a-2|
,|a-1| a-1
∵a=2-
<1,3
∴原式=
-a(a-2) -(a-2) -(a-1) a-1
=-a+1
=-(2-
)+13
=
-1.3