How potentiate $(x^a)^b$ for complex numbers?
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1in this case $x$ is complex number? – dato datuashvili Jan 10 '14 at 16:11
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See for example this or this or this. Just search on-site for "complex powers" and you will find plenty more. – mrf Jan 10 '14 at 16:11
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see this - http://math.stackexchange.com/questions/593907/how-to-prove-that-every-number-to-the-power-of-any-other-numbers-can-be-express/593924#593924 – Suraj M S Jan 10 '14 at 16:19