Hey anyone knows how to graph y=a^x, a<0.
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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.
In order that 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 on real axes for a< 0.
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