通分x+1/x(x-1),x/x^2-1,2/x^2-2x+1

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通分x+1/x(x-1),x/x^2-1,2/x^2-2x+1通分x+1/x(x-1),x/x^2-1,2/x^2-2x+1通分x+1/x(x-1),x/x^2-1,2/x^2-2x+1(x+1)/x

通分x+1/x(x-1),x/x^2-1,2/x^2-2x+1
通分x+1/x(x-1),x/x^2-1,2/x^2-2x+1

通分x+1/x(x-1),x/x^2-1,2/x^2-2x+1
(x+1)/x(x-1)=(x-1)(x+1)²/x(x+1)(x-1)²
x/(x^2-1)=x²(x-1)/x(x+1)(x-1)²
2/(x^2-2x+1) =2x(x+1)/x(x+1)(x-1)²