问题
解答题
化简下列各式: (1)(
(2)(-1)2010-(
|
答案
(1)原式=[
+a+1 a-1
]•1 (a-1)2
=a-1 a
•a2-1+1 (a-1)2
=a-1 a
•a2 (a-1)2
=a-1 a
;a a-1
(2)原式=1-1+2=2.
化简下列各式: (1)(
(2)(-1)2010-(
|
(1)原式=[
+a+1 a-1
]•1 (a-1)2
=a-1 a
•a2-1+1 (a-1)2
=a-1 a
•a2 (a-1)2
=a-1 a
;a a-1
(2)原式=1-1+2=2.