问题
解答题
先化简,再求值:
|
答案
÷(1+x2 x-1
)1 x2-1
=
÷x2 x-1 x2-1+1 x2-1
=
•x2 x-1 (x+1)(x-1) x2
=x+1(6分)
当x=2008时,原式=2009.(8分)
先化简,再求值:
|
÷(1+x2 x-1
)1 x2-1
=
÷x2 x-1 x2-1+1 x2-1
=
•x2 x-1 (x+1)(x-1) x2
=x+1(6分)
当x=2008时,原式=2009.(8分)