Answer
With $g(x)=\sqrt{x},$ and $f(x)=x+1$,
$F(x)=f[g(x)]=f\circ g(x)$
Work Step by Step
If we were to calculate by hand,
we would first calculate the square root of the number$\qquad$...$ g(x)=\sqrt{x}$,
then add 1 to that number $\qquad$ .... $f(x)=x+1$
In this way, $F(x)=f(g(x))=f\circ g(x)$