Question

escreva a forma z= a + bi o numero complexo z= 1/1+i

Answer 1

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