Note that it includes 0 as well in the domain.

I. e. , the square root function domain is [0, ∞).

Webdetermine the domain of functions worked example:

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Webthe sequence of graphs in figure 2 also help us identify the domain and range of the square root function.

Determining domain word problem (positive integers)

In general, the square root of a number can be either positive or negative.

I. e. , √25 = 5.

In figure 2 (a), the parabola opens outward indefinitely, both left.

In figure 2 (a), the parabola opens outward indefinitely, both left.

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