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**xboxlive89128** I am asked to find $\displaystyle (i-1)^{\frac{1}{17}}$. This is my first class in complex analysis. I used this formula $\displaystyle z^{\frac{1}{n}}= ^n\sqrt{r} \cdot exp [i(\frac{\theta}{n}+\frac{2k\pi}{n})]$ where $\displaystyle k=0, \ldots, n-1$ and I got $\displaystyle ^{34}\sqrt{2} \cdot exp [i(\frac{-\pi}{68}+\frac{2k\pi}{17})] k=0, \ldots, 16$. That's what I got after fully simplfying everything. Is this correct? Mr F says: No.

I just want to make sure I did right.