问题
解答题
先化简,再求值:(x+1+
|
答案
原式=
÷x2-2x-3+4 x-3 x-1 x(x-3)
=
•(x-1)2 x-3 x(x-3) x-1
=x(x-1)(4分)
当x=
+1时3
原式=(
+1)(3
+1-1)=3+3
.(6分)3
先化简,再求值:(x+1+
|
原式=
÷x2-2x-3+4 x-3 x-1 x(x-3)
=
•(x-1)2 x-3 x(x-3) x-1
=x(x-1)(4分)
当x=
+1时3
原式=(
+1)(3
+1-1)=3+3
.(6分)3