问题 解答题
(1)计算:3tan30°+|3-π|-
3
(2010-π)0+(-1)2013

(2)先化简,再求值:(
3x
x+1
-
x
x-1
x-2
x2-1
,其中x=
3
2
答案

(1)原式=3×

3
3
+π-3-
3
-1

=

3
+π-3-
3
-1

=π-4;

(2)原式=

3x(x-1)-x(x+1)
(x+1)(x-1)
×
(x+1)(x-1)
x-2

=

2x(x-2)
x-2

=2x.

单项选择题
单项选择题