计算:[a²/(a-b)+b²/(b-a)]/[(a+b)/ab]
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计算:[a²/(a-b)+b²/(b-a)]/[(a+b)/ab]
计算:[a²/(a-b)+b²/(b-a)]/[(a+b)/ab]
计算:[a²/(a-b)+b²/(b-a)]/[(a+b)/ab]
[a²/(a-b)+b²/(b-a)]/[(a+b)/ab]
=[(a²-b²)/(a-b)]/[(a+b)/ab]
=(a+b)×ab/(a+b)
=ab