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原式=(x+1)/(x-1)-x(x-2)/(x+1)(x-1)÷(x-2)(x+1)/(x+1)²; =(x+1)/(x-1)-x/(x-1) =(x+1-x)/(x-1) =1/(x-1) 請好評 ~在右上角點擊【評估】,然後就可以選擇【滿意,問題已經完美解决】了. 如果你認可我的回答,敬請及時採納, ~你的採納是我前進的動力~~
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