Question

What is the domain and range of `y=x^3`?

Answer 1

Domain is `(-oo, oo)`, Range is `(-oo, oo)`,

Because every real number can be cubed to get a real answer, `x` may be any real number, so the domain is all real numbers.

Because every real number is the cube of some real number (its cube root is real), `y` takes on all real values, so the range is all real numbers.