### Home > INT3 > Chapter 7 > Lesson 7.1.3 > Problem 7-40

7-40.

Explain why *i*^{3} = –*i*. What does *i*^{4} equal? Homework Help ✎

*i* ^{3} = *i* ^{2} · *i*. What does *i* ^{2} equal?

How can you rewrite *i* ^{4} as a product of *i* ^{2} and/or *i* factors?