Question

What is the value of the range of the function f(x)=x^2+2 for the domain value 1/4?

Answer 1

Subst. 1/4 for x in f(x) = x^2 + 2:  f(1/4) = (1/4)^2 + 2 = 1/16 + 2  =  2 1/16

This is the range when the domain is 1/4.  Usually a domain contains more than one number.