Solve for u (complex solution)
u=3^{\frac{2}{5}}e^{\frac{2\pi i}{5}}\approx 0.479546655+1.475892845i
u=3^{\frac{2}{5}}\approx 1.551845574
u=3^{\frac{2}{5}}e^{\frac{4\pi i}{5}}\approx -1.255469442+0.912151942i
u=3^{\frac{2}{5}}e^{\frac{6\pi i}{5}}\approx -1.255469442-0.912151942i
u=3^{\frac{2}{5}}e^{\frac{8\pi i}{5}}\approx 0.479546655-1.475892845i
Solve for u
u=3^{\frac{2}{5}}\approx 1.551845574
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