Question

How do you find the domain and range of `f(x) = sqrt(x-1)`?

Answer 1

The domain question is easy: the `x-1` may not be negative, so `x>=1`, or domain : `[1,oo)`

Explanation:

The range is not so hard either: when `x=1` then `f(x)=0`. it cannot go any lower so range : `[0,oo)`