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x/(x+y)(x-y)的三次方,y/(y+x)(y-x)的平方通分
人气:191 ℃ 时间:2020-03-21 09:37:51
解答
x/(x+y)(x--)^3=x/(x+y)(x--y)^3
y/(y+x)(y--x)^2=y(x--y)/(x+y)(x--y)^3.
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