# USE OF INTERVAL NOTATION

May 28th, 2015
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Interval notation is another method for writing domain and range.In set builder notation braces (curly parentheses {} ) and variables are used to express the domain and range. Interval notation is often considered more efficient.

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University of Perpetual Help System Dalta CalambaCollege of Engineering and ArchitectureAdvanced AlgebraAssignment no. 1 PRELIMName : Escorial, Drexler M.Date : November 24, 2011Course/Yr./Sec. : BSCE, 1-AScore : ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~USE OF INTERVAL NOTATIONInterval notation is another method for writing domain and range.In set builder notation braces (curly parentheses {} ) and variables are used to express the domain and range. Interval notation is often considered more efficient.In interval notation, there are only 5 symbols to know:Open parentheses ( )Closed parentheses [ ]InfinityNegative InfinityUnion SignTo use interval notation:Use the open parentheses ( ) if the value is not included in the graph. (i.e. the graph is undefined at that point... there's a hole or asymptote, or a jump)If the graph goes on forever to the left, the domain will start with (. If the graph travels downward forever, the range will start with (. Similarly, if the graph goes on forever at the right or up, end with)Use the brackets [ ] if the value is part of the graph.Whenever there is a break in t

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