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

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Answer 1 · 2016-03-11T11:18:58

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

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

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