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ioda
3 years ago
14

The range of the function f(x) = x + 5 is {7, 9}. What is the function’s domain?

Mathematics
1 answer:
ehidna [41]3 years ago
6 0
\bf \begin{cases}
\textit{function's range, is the values of "y"}\\
\textit{function's domain, is the values of "x"}
\end{cases}
\\\\
thus\qquad f(x)=y=x+5\to 
\begin{cases}
y=7\\
y=9
\end{cases}
\\\\\\
then\implies 
\begin{cases}
7=x+5\implies ?=x
\\\\
9=x+5\implies ?=x
\end{cases}

solve for "x"
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