1. Introduction A domain is an area of knowledge, influence, or ownership. The word
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For the quadratic function [latex]f\left(x\right)={x}^{2}[/latex], the domain is all real numbers since the horizontal extent of the graph is the whole real number line. Because the graph does
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How do you know if a domain is all real numbers? For the cubic function f(x)=x3 f ( x ) = x 3 , the domain is all real numbers because the horizontal extent of the graph is the
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Is The Domain Always All Real Numbers The domain of a function can be all real numbers, but there are some cases where the domain is not all real numbers. For example, the domain of
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