Let $f(x)=\sqrt{x-3}$ And $g(x)=x^{2}+1$ Compute $g \circ f$ And State Its Domain in Interval Notation

Short Answer

Let $f(x)=\sqrt{x-3}$ and $g(x)=x^{2}+1$
Compute $g \circ f$ and state its domain in interval notation.