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Thread: solution for f(x1+x2)=f(x1)+f(x2)

  1. January 4th 2012, 08:35 PM #1
    yuvatheyuva
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    solution for f(x1+x2)=f(x1)+f(x2)

    is there any functions f(x) for which
    f(x1+x2)=f(x1)+f(x2) other than the one given below?

    f(x)=cx
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  2. January 4th 2012, 09:04 PM #2
    FernandoRevilla
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    Re: solution for f(x1+x2)=f(x1)+f(x2)

    Look here:

    Cauchy's functional equation
    Thanks from thm43608
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