Question

$frac{1}{ i^{13} }$+$frac{1}{ i^{23} }$+$frac{1}{ i^{33} }$ СРОЧНО ПОМОГИТЕ!!!!!!!

Answer 1

i¹³=i¹²⁺¹=i  1/i=i/i²=-i
i²³=i²⁰⁺³=-i  -1/i=i
i³³=i³²⁺¹=i  1/i=-i
-i+i-i=-i