Question

(20 points!) Simplify i^31. A. 1 B. -1 C. i D. -i

Answer 1

-i

Explanation:

rewrite

one to any power is one

multiply

rewrite

Answer 2

-i

Explanation:

i^30 × i

(i^2)^15 × i

(-1)^15 × i

-1 × i

-i