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新槍手 發表於 22-6-2011 19:59 http://www.nakuz.com/bbs/images/common/back.gif
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新槍手 發表於 22-6-2011 19:59 http://www.nakuz.com/bbs/images/common/back.gif
甘你識用咩槍=.=
有無人識e條數?
By MI ,prove that the ......true for all positive integers n.
(5n+24)6^(n)+1 is divisible by 25
when n=1
‧
‧
‧
Assume.......
i.e.(5k+24)6^(k)+1=25M,where M is an integer
When n=k+1
6^(k+1)+1
=6^(k+1)+1
=[(5k+24)6^k+1]6+5x6^(k+1)-6+1
=25Mx6+5x6^(k+1)-5
=5
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Killer104 發表於 22-6-2011 19:48 http://www.nakuz.com/bbs/images/common/back.gif
FO IS KAI ZI
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新槍手 發表於 22-6-2011 20:04 http://www.nakuz.com/bbs/images/common/back.gif
係人都識用啦= =
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新槍手 發表於 22-6-2011 20:04 http://www.nakuz.com/bbs/images/common/back.gif
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