When I plot(adsbygoogle = window.adsbygoogle || []).push({});

[itex] y = 3x^{\frac{4}{3}}-\frac{3}{32}x^{\frac{2}{3}}[/itex],

I get: https://dl.dropbox.com/u/5653705/pfgraph1.png [Broken]

but I don't see any reason for the domain to be restricted to [itex] x > 0 [/itex]. There is only acubicroot, which is well defined for negative numbers ... I've tried on a few different programs & always get the same thing, can anyone explain why? Is the domain actually restricted to positive x?

Thanks in advance,

Rax

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# Why is the domain of this rational function restricted to x > 0?

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