问题
填空题
当x=3时,代数式(1+
|
答案
解;(1+
)÷1 x-2
,x2-1 2x-4
=
×x-1 x-2
,2(x-2) (x+1)(x-1)
=
,2 x+1
当x=3时,原式=
=2 3+1
.1 2
故答案为:
.1 2
当x=3时,代数式(1+
|
解;(1+
)÷1 x-2
,x2-1 2x-4
=
×x-1 x-2
,2(x-2) (x+1)(x-1)
=
,2 x+1
当x=3时,原式=
=2 3+1
.1 2
故答案为:
.1 2