先化简(x-1分之x+1+1)÷x^2-2X+1分之x^2+x
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解:
原式=【(x+1)/(x-1)+1】÷(x^2+x)/(x^2-2x+1)
=(x+1+x-1)/(x-1)÷x(x+1)/(x-1)^2
=2x/(x-1)*(x-1)^2/x(x+1)
=2(x-1)/(x+1)
原式=【(x+1)/(x-1)+1】÷(x^2+x)/(x^2-2x+1)
=(x+1+x-1)/(x-1)÷x(x+1)/(x-1)^2
=2x/(x-1)*(x-1)^2/x(x+1)
=2(x-1)/(x+1)
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