问题
解答题
化简求值:(
|
答案
原式=
÷x+1-x
(1+x
)x x-1+x
(1+x
)x
=
•1
(1+x
)x
(1+x
)x 2x-1
=
,1 2x-1
当x=
时,原式=2 2
=1 2×
-12 2
+1.2
化简求值:(
|
原式=
÷x+1-x
(1+x
)x x-1+x
(1+x
)x
=
•1
(1+x
)x
(1+x
)x 2x-1
=
,1 2x-1
当x=
时,原式=2 2
=1 2×
-12 2
+1.2