You at first you don't think f(N1)=N2,so,I ,,,,your deduce prove

回答: 回複:I like math, not myth nor mystification15少2011-06-02 17:24:06

You  change 1) ......to f(t+2001)=f(t)+2011.

You cut my sentence,good. I am too old ,70,to be right everywhere.It should be f(N1)=N2,f(N2)=N1...

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