(Section 1.1: Functions)1.1.11PART H: FINDING DOMAINS AND/OR RANGESExample 11 (Squaring Function: Finding Domain and Range)Let fx()=x2. Describe the domain and the range offusing set-builder, graphical, and interval forms. § Solutionx2is a polynomial, so we assume that Domf=±. • The symbol ±is used in place of set-builder form. • The graphof ±is the entire real number line: • In interval form, ±is ±²,². The resulting rangeoffis the set of all nonnegativereal numbers, because every such number is the square of some real number. For example, 7 is the
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