问题
解答题
(1)计算:-22+(
(2)化简:
|
答案
(1)-22+(
)0+2sin30° 1
-12
=-4+1+1
=-2;
(2)
÷(x-x-1 x
)1 x
=
•x-1 x x (x+1)(x-1)
=
.1 x+1
(1)计算:-22+(
(2)化简:
|
(1)-22+(
)0+2sin30° 1
-12
=-4+1+1
=-2;
(2)
÷(x-x-1 x
)1 x
=
•x-1 x x (x+1)(x-1)
=
.1 x+1