I.
e.
, the square root function domain is [0, ∞).
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Note that it includes 0 as well in the domain.
In general, the square root of a number can be either positive or negative.
I.
e.
, √25 = 5.
Webdetermine the domain of functions worked example:
Determining domain word problem (real numbers) worked example:
Determining domain word problem (positive integers)
Webthe sequence of graphs in figure 2 also help us identify the domain and range of the square root function.
In figure 2 (a), the parabola opens outward indefinitely, both left.
