Question

resolver os complexos d) i7

Answer 1

$i^{7}=i^{4+3}\\\\i^{7}=i^{4}\cdot i^{3}\\\\i^{7}=1\cdot i^{2+1}\\\\i^{7}=i^{2}\cdot i^{1}\\\\i^{7}=(-1)\cdot i^{1}\\\\\boxed{\boxed{i^{7}=-i}}$