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引用第36樓yhmjack1於2010-10-01 20:25發表的 :Let p(n) be the statementn^3+5n is divisble by 6For n=1(1)^3+5(1)=1+5.......
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引用第40樓scfkipper於2010-10-01 22:31發表的 :點解紅色果度係咁ge??why 3k^2+3k = 6N??點解ge
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