先化简,再求值:(x/x-1 -1/x2-1)/(x+1),其中x=根号2

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先化简,再求值:(x/x-1 -1/x2-1)/(x+1),其中x=根号2
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先化简,再求值:(x/x-1 -1/x2-1)/(x+1),其中x=根号2
先化简,再求值:(x/x-1 -1/x2-1)/(x+1),其中x=根号2

先化简,再求值:(x/x-1 -1/x2-1)/(x+1),其中x=根号2
=[x(x+1)/(x+1)(x-1) -1/(x+1)(x-1) ÷(x+1)
=(x²+x-1)/(x+1)(x-1)×1/(x+1)
=(x²+x-1)/(x+1)²(x-1) 感觉你的题目不完整