化简求值(a-1+2/a+1)÷(a²+1),其中a=√2-1
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化简求值(a-1+2/a+1)÷(a²+1),其中a=√2-1
化简求值(a-1+2/a+1)÷(a²+1),其中a=√2-1
化简求值(a-1+2/a+1)÷(a²+1),其中a=√2-1