Question

calcule a raiz cubica de : a) 27 b)64i c)-i d)-8

Answer 1

a) 27 = 3
b) 64i = 3,46410162 + 2 i
c) -i = 0,866025404 - 0,5 i
d) -8 = -2

Answer 2

Boa noite 

a) ³√27 = ³√(3*3*3) = 3

b) ³√(64i) = ³√64*³√i) = 4*(√3 + i)/2 = (3.464... + 2i 

c)  ³√(-i) = (√3 - i)/2

d) ³√(-8) = ³√(-2*-2*-2) = -2