() this means it includes the #

[] is it the same as {} this? and means it dose not include the # when writing in interval notation

infinity always gets a parentheses correct?

domain look left to right?

range up down?

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- January 26th 2008, 07:25 PM #1

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- Mar 2007
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- January 26th 2008, 07:32 PM #2
no, ( or ) means it does NOT include the number:

[ or ] means it the number is included:

{} as i usually see it deals with specific elements.

example, we might write as or something like that

infinity always gets a parentheses correct?

domain look left to right?

range up down?