(1/x+1+x²-2x+1/x²-1）÷x-1/x+1，其中x=2 化简求值
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[1/(x+1)+(x²-2x+1)/(x²-1)]÷(x-1)/(x+1)
=[1/(x+1)+(x-1)²/(x+1)(x-1)]÷(x-1)/(x+1)
=[1/(x+1)+(x-1)/(x+1)]÷(x-1)/(x+1)
=x/(x+1)÷(x-1)/(x+1)
=x/(x-1)
=2/(2-1)
=2
如果不懂，请追问，祝学习愉快！
=[1/(x+1)+(x-1)²/(x+1)(x-1)]÷(x-1)/(x+1)
=[1/(x+1)+(x-1)/(x+1)]÷(x-1)/(x+1)
=x/(x+1)÷(x-1)/(x+1)
=x/(x-1)
=2/(2-1)
=2
如果不懂，请追问，祝学习愉快！
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