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

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

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Answer 1 · 2017-01-18T18:19:09

Both the domain and range are all real numbers, or $RR$ .

Explanation:

$x^3$ is a polynomial, which means its domain is $RR$ , and in our case, its range is also $RR$ because the only root that $x^3$ has, 0, is not a double root (technically it's a triple root, and because 3 is odd, the function switches sign).

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

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