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数学
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logx-logy=log(x-y),用y表示x,
人气：487 ℃ 时间：2020-06-23 19:46:51
解答
易知x>y>0
log(x/y)=log(x-y)
x/y=x-y
x=yx-y²
(y-1)x=y²
x=y²/(y-1) (y>1)
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