问题 解答题
计算:
(1)
2
x+1
-
1
x-1

(2) 0.25×(-2)-2÷(16)-1-(π-3)0
答案

(1)

2
x+1
-
1
x-1
=
2x-2-x-1
(x+1)(x-1)
=
x-3
x2-1

(2)0.25×(-2)-2÷(16)-1-(π-3)0=

1
4
×
1
4
×16-1=0.

单项选择题
单项选择题