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三个分式通分题(1):2xy/(x+y)²与x/x²-y²(2):x-y/2x+2y与xy

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三个分式通分题
(1):2xy/(x+y)²与x/x²-y²
(2):x-y/2x+2y与xy/(x+y)²
(3):2mn/4m²-4与2m-3/2m+3
三个分式通分题(1):2xy/(x+y)²与x/x²-y²(2):x-y/2x+2y与xy
(1)2xy(x-y)/[(x+y)²(x-y)]与x(x+y)/[(x+y)²(x-y)]
(2) (x²-y²)/2(x+y)²与2xy/2(x+y)²
(3)2mn(2m+3)/[4(m²-1)(2m+3)]与(2m-3)(4m²-4)/[4(m²-1)(2m+3)]