My text book asks us to prove $z^n+\bar z^n$ is a real number where $\bar z$ is $z$ conjigate. $z$ is a nonzero complex number and $n$ is an integer
Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. It's 100% free, no registration required.
Here's how it works:
- Anybody can ask a question
- Anybody can answer
- The best answers are voted up and rise to the top