Question

how to know if a function is neither an odd or even?

Answer 1

if
f(x)=f(-x) --x>even func
f(x)=-f(-x) -->odd func
if none of above is satisfied -->function is neither..

Answer 2

eg.
x^2 = (-x)^2 -->even func
x^3 = -(-x)^3 -->odd func
x^2 + x =f(x)
x^2 - x =f(-x)
here,f(x) is neither..