Question:

Math! What is the value of i^99 - i^3?
What is the value of i^99 - i^3

Answers:

A-Best: Remember i = root(-1) So, i^x, for any even x = -1 i^99 - i^3 = i^(98)*i^(1) - i^(2)*i^(1) = i^1 - i^1 = -i + i = 0 If i is not root(-1), i.e. you have not studied complex numbers yet and i is just a variable then... i^99 - i^3 = i^3 (i^96 - 1) is as far as you can get  

A: If i is a variable, then i^96. If i stands for an imaginary number then 0.  

A: i^96?  

A: i^96.  

A: i^99=-i i^3=-i -i+i=0 0 is your answer