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If $f(x)$ is a function whose domain is $[-1,9]$, and $g(x)=f(x^2)$, then the domain of $g(x)$ is an interval of what width?

 Feb 22, 2021
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g(x) is defined for -1 <= x <= 3, so the width of the interval is 4.

 Mar 12, 2021

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