Question

O complexo 3+i/1-i,é igual a;

Answer 1

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