问题
解答题
(1)计算:2-1+(-1)2013+(2013-π)0-sin30° (2)化简:(1+
|
答案
(1)原式=
-1+1-1 2
=0;1 2
(2)原式=
•(x-1)2x2-2x (x-1)2
=
•(x-1)2x(x-1) (x-1)2
=2x.
(1)计算:2-1+(-1)2013+(2013-π)0-sin30° (2)化简:(1+
|
(1)原式=
-1+1-1 2
=0;1 2
(2)原式=
•(x-1)2x2-2x (x-1)2
=
•(x-1)2x(x-1) (x-1)2
=2x.