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avatar+147 

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 24, 2021
 #1
avatar+421 
+1

The minimum value of $x^2$ is $0$, the maximum is $81$. The answer is just $\boxed{81}$.

 Feb 24, 2021
 #2
avatar+300 
0

The answer is actually 6.

 Feb 24, 2021

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