Répondre :
(racine(3)-i)^67 = 2^67 (racine(3)/2-i*1/2)^67
=2^67 (cos(2pi/3) + i sin(2pi/3))^67
= exp(67 ln(2)) * exp(2pi/3)^67
= exp(67 ln(2)) * exp(67*2pi/3)
=exp(67*(ln(2)+2pi/3))
=2^67 (cos(2pi/3) + i sin(2pi/3))^67
= exp(67 ln(2)) * exp(2pi/3)^67
= exp(67 ln(2)) * exp(67*2pi/3)
=exp(67*(ln(2)+2pi/3))