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一道数学通分题
x-y/2x+2y与xy/(x+y)²
人气:193 ℃ 时间:2020-05-27 15:01:28
解答
x-y/2x+2y
=(2x^2-y+2xy)/2x
=(2x^2-y+2xy)(x+y)^2/2x(x+y)^2
xy/(x+y)^2
=2x*xy/2x(x+y)^2
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