Question

If $f\left(x\right)=2x+1$, then $f\left(\frac{x}{2}\right)=?$

Answer 1

$f\left(x\right)=2x+1$
then what is $f\left(\frac{x}{2}\right)$

$f\left(\frac{x}{2}\right)=2\left(\frac{x}{2}\right)+1$

$f\left(\frac{x}{2}\right)=x+1$