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Math Help - [SOLVED] one-to-one function or not?

  1. #1
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    [SOLVED] one-to-one function or not?

    thanks
    Last edited by smith.5954; October 5th 2009 at 06:11 AM. Reason: figured it out myself :)
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  2. #2
    Super Member Gamma's Avatar
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    i think the biggest problem is that function is not well defined.

    f(1/2)=2\cdot 1 + 2=4 but
    f(2/4)=2 \cdot 2 + 4= 8

    Even if it were well defined, its not injective
    f(3/4)=f(1/8) but clearly 3/4 \not = 1/8
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