The functions $f$ and $g$ are defined by the given equations, where $x\ge 0$. Which of the following equations displays, as a constant or coefficient, the maximum value of the function it defines, where $x\ge 0$?

1. $f\left(x\right)=18{\left(1.25\right)}^x+41$
2. $g\left(x\right)=9{\left(0.73\right)}^x$