Both the domain and range are the set of all real numbers. Parentheses inside other parentheses (or brackets and braces) are also referred to as "nested parentheses." Ask Your Question Fast! The same applies to the vertical extent of the graph, so the domain and range include all real numbers. Exclude from the domain any input values that have nonreal (or undefined) number outputs. Parentheses, ( ), are used to add extra information in text, while brackets, [ ], are used mainly in quotations to add extra information that Box Office History for Horror Movies. http://www.the-numbers.com/market/genre/Horror. The only output value is the constant \(c\), so the range is the set \(\{c\}\) that contains this single element. For example, (3,7) includes 3.1 and 3.007 and 3.00000000002, but it does not include 3. So our domain is going to be all values of x. Example \(\PageIndex{8B}\): Working with a Piecewise Function. Because 1.5 is less than 2, we use the first formula. Set the radicand greater than or equal to zero and solve for x. //-->,