應為-1-LNX=0,X=1/E達極值,不是-1+LNX=0,X=1/E達極值.

來源: jinjing 於 2013-04-10 12:47:58 [檔案] [舊帖] [給我悄悄話] 閱讀數 : (6 bytes)

回答: 棒極了,續個貂.P(K)=(K/N){1/K　+　1/(K+1)　+　...　+　1/(N-1)}= 由 jinjing 於 2013-04-10 12:41:26

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