The document presents the function f(x) = (x-5)^2. It states that the domain of this function is all real numbers, or (-infinity, +infinity), as it is defined for every value of x. The function is a basic quadratic function centered at x=5.

1. f(x) = (x-5)^2
Domain of the function = ( -infinity , + infinity)
As it exists for every x
Solution
f(x) = (x-5)^2
Domain of the function = ( -infinity , + infinity)
As it exists for every x