Question

Which of the following is equal to
–
𝑖? Select all that apply.

𝑖2

𝑖3

𝑖4

𝑖5

𝑖6

𝑖7
Submit

Answer 1

i^3 and i^7.

Reason: powers of i cycle every 4:
i^1 = i
i^2 = −1
i^3 = −i
i^4 = 1
so i^5 = i, i^6 = −1, i^7 = −i, etc.