x+1分之x²-1 ÷ x²-x分之x²-2x+1

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x+1分之x²-1 ÷ x²-x分之x²-2x+1
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x+1分之x²-1 ÷ x²-x分之x²-2x+1
x+1分之x²-1 ÷ x²-x分之x²-2x+1

x+1分之x²-1 ÷ x²-x分之x²-2x+1
=(x-1)÷(x-1)/x
=x