Answer
even;
odd
Work Step by Step
RECALL:
(1) A function is even if $f(-x) = f(x)$ for every $x$ in the domain of $f$.
(2) A function is odd if $f(-x) = -f(x)$ for every $x$ in the domain of $f$.
Thus, the missing expressions in the given statements are (in order):
even;
odd
