两个数学计算.a/b-(a-b)/b=x^2+xy/(x-y)÷xy/(x-y)
4个回答
a/b-(a-b)/b=(a-a+b)/b=b/b=1
(x^2+xy)/(x-y)÷xy/(x-y)
=(x^2+xy)/xy
=(x+y)/y
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