答案:

來源: 2025-12-03 13:25:31 [舊帖] [給我悄悄話] 本文已被閱讀:

兩邊各取兩次對數 ln 得:
pi vs. e*ln(pi) + ln(ln(pi))

define function 

f(x) = e*ln(x) + ln(ln(x)) - x

f(e) =0. Try to get f(pi) > 0

easy to get f'(x) > 0 when x>e

所以原式左邊較小右邊較大