计算:(a/a-b-a²/a²-2ab+b²)÷(a/a+b-a²/a²-b² )+1.
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计算:(a/a-b-a²/a²-2ab+b²)÷(a/a+b-a²/a²-b² )+1.
计算:(a/a-b-a²/a²-2ab+b²)÷(a/a+b-a²/a²-b² )+1.
计算:(a/a-b-a²/a²-2ab+b²)÷(a/a+b-a²/a²-b² )+1.
原式=(a²-ab-a²)/(a-b)²÷(a²-ab-a²)/(a+b)(a-b)+1
=-ab/(a-b)²×[-(a+b)(a-b)/ab]+1
=(a+b)/(a-b)+1
=(a+b+a-b)/(a-b)
=2a/(a-b)