问题
解答题
先化简(
|
答案
原式=
×x+1-x+1 (x-1)(x+1) 2(x+1)(x-1) x
=
×2 (x-1)(x+1) 2(x+1)(x-1) x
=
,4 x
当x=
时,原式=1 2
=8.4 1 2
先化简(
|
原式=
×x+1-x+1 (x-1)(x+1) 2(x+1)(x-1) x
=
×2 (x-1)(x+1) 2(x+1)(x-1) x
=
,4 x
当x=
时,原式=1 2
=8.4 1 2