x/x-1-1/x+1÷1/x²-1再从-1,0,1三个数中x/(x-1)-1/(x+1)÷1/x²-1再从-1,0,1三个数中选择合适的数代入求值
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x/x-1-1/x+1÷1/x²-1再从-1,0,1三个数中x/(x-1)-1/(x+1)÷1/x²-1再从-1,0,1三个数中选择合适的数代入求值
x/x-1-1/x+1÷1/x²-1再从-1,0,1三个数中
x/(x-1)-1/(x+1)÷1/x²-1再从-1,0,1三个数中选择合适的数代入求值
x/x-1-1/x+1÷1/x²-1再从-1,0,1三个数中x/(x-1)-1/(x+1)÷1/x²-1再从-1,0,1三个数中选择合适的数代入求值
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