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a+b=a(1+b)
kingfish2010
2024-04-29 12:49:37
( reads)
跟帖(1)
bbcc2001
2024-04-29 12:53:31
it only valids when b=a+4.
bbcc2001
2024-04-29 12:53:31it only valids when b=a+4.