SOLUTION: I know that i^2 is -1 but what is i^3 and i^4 ?

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Question 4005: I know that i^2 is -1 but what is i^3 and i^4 ?
Answer by longjonsilver(2297) About Me  (Show Source):
You can put this solution on YOUR website!
powers of i go in a 4-power cycle:

i is defined as sqrt%28-1%29

starting with i
--> i%5E2+=+-1
--> i%5E3+=+-i
--> i%5E4+=+1

i%5E5 is then i again, and the whole thing repeats.

Jon.