Have you seen the phrase "square root functions" in your textbook or somewhere? If so, they probably define what they mean by that.Are square root functions a group of functions or a function? (Precalculus)
Yes, thanks![MATH]\sqrt{x}[/MATH] is a single function, but you can compose it with other functions to create a family of functions like
[MATH]f(x) = 3\sqrt{|x|} + 2[/MATH]
[MATH]f(x) = - \sqrt{2x^2 + 2}[/MATH]
Does this answer your question?