Answer
$\text{even; odd}$
Work Step by Step
If $f(-x)=f(x)$, then $f$ is an even function.
If $f(-x)=-f(x)$, then $f$ is an odd function
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.