问题
解答题
先化简,再求值:
|
答案
原式=
÷(x+1 x
-2x2 2x
)-11+x2 2x
=
÷x+1 x
-1x2-1 2x
=
•x+1 x
-12x (x-1)(x+1)
=
-1.2 x-1
当x=
+1时,原式=2
-1,2
+1-12
=
-12 2
=
-1.2
先化简,再求值:
|
原式=
÷(x+1 x
-2x2 2x
)-11+x2 2x
=
÷x+1 x
-1x2-1 2x
=
•x+1 x
-12x (x-1)(x+1)
=
-1.2 x-1
当x=
+1时,原式=2
-1,2
+1-12
=
-12 2
=
-1.2