Can anyone point me to a text or link that summarizes the rules when evaluating/simplifying an expression of the form(adsbygoogle = window.adsbygoogle || []).push({});

[tex] (a^n)^(1/m) [/tex] for a < 0. [tex] (a^n)^(1/m) [/tex] yields different answers for [tex] a^(n/m) [/tex] and [tex] (a^(1/m))^n [/tex].

Ex:

[tex] (-8)^(2/6) = (-8)^(1/3) = -2 [/tex]

[tex] (-8)^(2/6) = ((-8)^2)^(1/6) = 2 [/tex]

[tex] (-8)^(2/6) = (-8^(1/6))^2 = undefined [/tex]

Thank you very much!

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# Homework Help: Evaluating rational exponents

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