问题
解答题
计算: (1)|-1|-
(2)
|
答案
(1)原式=1-2+1+1 4
=
;1 4
(2)原式=3
+2
-4×(
-1)(2
-1)2 (
+1)×(2
-1)2 1 4 2
=3
+2-22
+1-2 2
=3.
计算: (1)|-1|-
(2)
|
(1)原式=1-2+1+1 4
=
;1 4
(2)原式=3
+2
-4×(
-1)(2
-1)2 (
+1)×(2
-1)2 1 4 2
=3
+2-22
+1-2 2
=3.