Question

Qual o valor de i⁷︎ + i⁵︎
A)0
B)1
C)2
D)3

Answer 1

Resposta:

$i=\sqrt{-1}\\\\ i^{2} =(-1)\\\\ i^{5} =i^{2}.i^{2}.i =(-1).(-1).i= i\\\\\\\\ i^{7} =i^{2}.i^{2}. i^{2}i =(-1).i= -i\\\\\\logo, i^{5}+ i^{7}= i-i=0$