SAP forum上的万能解,所有数都能生成

来源: Williamluo 2010-01-12 11:47:02 [] [旧帖] [给我悄悄话] 本文已被阅读: 次 (525 bytes)
回答: IBM一月:二二得五康MM2010-01-06 04:21:09
Regarding the IBM monthly puzzle, my solution is
LN(√(EXP(LN(2)/LOG(2))))

a friend of mine just sent me another answer
sec(arctan(2))^2 = 5

it is good. However, not many people have heard of sec(). We may revise it as:
exp(-ln(cos(arctan(2))^2))

And we can have another approach:
first: √√√√√√exp(2)
then ln (√√√√√√exp(2))=ln(exp(2))/64
ln (ln(√√√√√√exp(2)))= ln(ln(exp(2)))-ln64=ln2-6ln2=-5ln2
-ln (ln(√√√√√√exp(2)))/ln2=5

所有跟帖: 

你,另一个天才! -戏雨飞鹰- 给 戏雨飞鹰 发送悄悄话 戏雨飞鹰 的博客首页 (0 bytes) () 01/12/2010 postreply 12:02:39

回复:SAP forum上的万能解,所有数都能生成 -Jinjing- 给 Jinjing 发送悄悄话 (103 bytes) () 01/12/2010 postreply 21:00:59

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