Why is $i^{4/3}$ not equal to 1?

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The iteration of exponents laws I learned gives: $$i^{4/3}=i^{4\cdot1/3}=(i^{4})^{1/3}=1^{1/3}=1$$ I know this is wrong but now the iteration of exponents laws I have used over the years somehow doesn't apply or is flawed. This is quite embarrassing as I have been studying mathematics for quite some time now. Please help.