问题
解答题
化简求值:
|
答案
÷(1-3x x2-1
),1 x+1
=
÷3x (x+1)(x-1)
,x x+1
=
•3x (x+1)(x-1)
,x+1 x
=
,3 x-1
当x=4时,原式=
=1.3 4-1
化简求值:
|
÷(1-3x x2-1
),1 x+1
=
÷3x (x+1)(x-1)
,x x+1
=
•3x (x+1)(x-1)
,x+1 x
=
,3 x-1
当x=4时,原式=
=1.3 4-1