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

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Answer 1 · 2015-03-26T03:09:08

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.

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