问题
解答题
计算. (1)
(2)
(3)
(4)
|
答案
(1)原式=
-a a-b
=b a-b
=1;a-b a-b
(2)原式=
=-1;1-x2 x2-1
(3)原式=
=2+1 1-m
;3 1-m
(4)原式=
=2m+1-m-n-1 m-n
=1.m-n m-n
计算. (1)
(2)
(3)
(4)
|
(1)原式=
-a a-b
=b a-b
=1;a-b a-b
(2)原式=
=-1;1-x2 x2-1
(3)原式=
=2+1 1-m
;3 1-m
(4)原式=
=2m+1-m-n-1 m-n
=1.m-n m-n