人气：182 ℃ 时间：2019-09-01 10:59:39
解答
原式=
-
=
-
=
…（4分）
当x=
时，
原式=
=
2…（6分）
推荐
- 先化简,再求值:x/x+2-(x^2+2x+1)/x+2÷x^2-1/x-1,其中x=根号3-2
- 先化简,再求值：x+1/x除以（x- 1+x²/2x）,其中x=根号2+1
- 先化简,再求值:(1+x^2)/(1-x^2)÷(2x/1-x -x),其中x=根号2
- 先化简再求值:(2x+1)(x-1)+x(根号2+1-x),其中x=-根号2
- 先化简,再求值:(x-2)/(x^2-1)÷(2x+2)/(x^2+2x+1)+1/(x-1),其中x=根号2+1
- I did what everyone does who has no idea what to do with themselves when they got out of college and went on to graduate
- Tom has over ten books.(改同义句） Tom has ____ ____ ten books.
- 成语‘狡兔三窟’的来历,请告诉.
猜你喜欢
