In figure 2 (a), the parabola opens outward indefinitely, both left. Determining domain word problem (real numbers) worked example: Webdetermine the domain of functions worked example:

I. e. , √25 = 5. In general, the square root of a number can be either positive or negative. I. e. , the square root function domain is [0, ∞). Note that it includes 0 as well in the domain. Determining domain word problem (positive integers)

Determining domain word problem (positive integers)