Let f(1)=f(2)=1 and f(n+2)=f(n+1)+f(n) for n=1,2,3,…… Denote an the unit digit of f(n). Prove that 0.a1a2a3a4……. is rational.
Simon YAU.
Mathematics Problem
2015-01-21 12:27 am
回答 (2)
2015-01-21 3:45 am
2015-01-21 3:48 am
Elegant!
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收錄日期: 2021-04-15 18:07:03
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