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Math Help - y=a^x, a<0. graphmatica failed!

  1. #1
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    Exclamation y=a^x, a<0. graphmatica failed!

    Hey anyone knows how to graph y=a^x, a<0.

    y=a^x, a&lt;0. graphmatica failed!-untitled.jpg
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  2. #2
    A Plied Mathematician
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    Not terribly surprising, considering that you're going to get a lot of complex function values. (-1/2)^(1/2) is complex, at least. Try plotting just the magnitude, or just the real part, or something like that instead.
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  3. #3
    MHF Contributor

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    In order that a^x be real (and singlevalued) a must be larger than or equal to 0. If a< 0, you will get complex values as Ackbeet said. You cannot graph y= a^x on real axes for a< 0.
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