Question

What is the variable of f(3) in the function below? f(x) =2^x

Answer 1

$\frak{Hi!}$

$\orange\hspace{300pt}\above2$

                              We have the expression -:

                             $\boldsymbol{\sf{f(x)=2^x}}$, and we're asked to find

                             $\boldsymbol{\sf{f(3)}}$.

                             To do that we put in the value for x (3)-:

                             $\boldsymbol{\sf{f(3)=2^3}}$.

                             Evaluate-:

                             $\boldsymbol{\sf{f(3)=2\times2\times2=8}}$

$\orange\hspace{300pt}\above3$

Answer 2

Hello !

We replace x by 3.

$f(3) = {2}^{3} = 8$

Have a nice day ;)