问题:
先化简,再求值: (1+
1
x-1
)÷
x
x2-1
,其中x=
1
2
+1
.
先化简,再求值: (1+
)÷
,其中x=
.
1 |
x-1 |
x |
x2-1 |
1 | ||
|
参考答案: