问题
解答题
化简求值:
|
答案
÷(1-2x x2-1
)1 x+1
=
•2x (x+1)(x-1) (x+1)-1 x+1
=
•2x (x+1)(x-1) x+1 x
=2 x-1
∴当x=3时,
原式=
=1.2 3-1
化简求值:
|
÷(1-2x x2-1
)1 x+1
=
•2x (x+1)(x-1) (x+1)-1 x+1
=
•2x (x+1)(x-1) x+1 x
=2 x-1
∴当x=3时,
原式=
=1.2 3-1