If f(x) = 2x + 1, then f(3) = ?

If f(x) = 2x + 1, then f(3) =9.
A function is a relation between a set of inputs having one output each. In simple words.
We have
[tex]f(x)=2^{x} +1\\f(3)=2^3+1\\f(3)=8+1\\f(3)=9.[/tex]
Learn more about Functions:
https://brainly.com/question/2328150
#SPJ2