r = 1.0000 + 1.7321i (2) m=[0,1,2]; R=abs(a)^(1/3); Theta=(angle(a)+2*pi*m)/3; rrr=R*exp(i*Theta) rrr = 1.0000 + 1.7321i -2.0000 + 0.0000i 1.0000 - 1.7321i (3) t=0:pi/20:2*pi;x=R*sin(t);y=R*cos(t); plot(x,y,'b:'),grid hold on plot(rrr(1),'.','MarkerSize',50,'Color','r') plot(rrr([2,3]),'o','MarkerSize',15,'Color','b') axis([-3,3,-3,3]),axis square |