What is the domain and range of $y = sqrt(x-4)$ ?

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Answer 1 · 2016-03-01T23:12:56

The domain is such that the argument $x-4>=0$

This means that $x>=4$ or domain = $[4,oo)$

The range: $y$ can only be non-negative, but has no limits at the upper side, so range = $[0,oo)$

Note: the "[" means 'inclusive'.

What is the domain and range of y = sqrt(x-4)y = sqrt(x-4)?