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2023-04-21
互联网 2023-04-21 07:55:48
(资料图)
1、这个还是比较好看的.1/(x+1)+1/y=1/2 (1)3/y-2/(x+1)=3 (2)(1)×2+(2)2/(x+1)+2/y+3/y-2/(x+1)=1+3。
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