I need help on this one.

Calculate (-2sqrt2i)^(2/3)

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- Mar 22nd 2009, 09:13 PMRichmondFractional powers of complex numbers
I need help on this one.

Calculate (-2sqrt2i)^(2/3) - Mar 22nd 2009, 09:58 PMChris L T521
Note that this is the same as $\displaystyle \left[\left(-2\sqrt{2}i\right)^2\right]^{\frac{1}{3}}=\left(-8\right)^{\frac{1}{3}}$

Now can you find the three roots of unity? First convert this to exponential form and see if you can take it from there. If you still have issues, post back :D - Mar 22nd 2009, 10:00 PMRichmond
thanks i'll give a try.