问题
解答题
先化简,再求值:(
|
答案
原式=
÷3(x+1)-(x-1) (x+1)(x-1) x (x+1)(x-1)
=
•2(x+2) (x+1)(x-1) (x+1)(x-1) x
=
,2(x+2) x
当x=6时,原式=
=2×(6+2) 6
.8 3
先化简,再求值:(
|
原式=
÷3(x+1)-(x-1) (x+1)(x-1) x (x+1)(x-1)
=
•2(x+2) (x+1)(x-1) (x+1)(x-1) x
=
,2(x+2) x
当x=6时,原式=
=2×(6+2) 6
.8 3