Can you help me please I’m struggling?

Answer:
if x goes negative infinity then f(x) go to negative infinity and
if x goes positive infinity then f(x) go to positive infinity
Step-by-step explanation:
f(x) = x^5 - 9x^3
Domain and range : all real numbers
So if x goes negative infinity then f(x) go to negative infinity and
if x goes positive infinity then f(x) go to positive infinity