Yahoo Answers: Answers and Comments for Interval notation help? [Homework Help]
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From Anonymous
enUS
Tue, 27 May 2008 17:00:25 +0000
3
Yahoo Answers: Answers and Comments for Interval notation help? [Homework Help]
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https://answers.yahoo.com/question/index?qid=20080527170025AAJ9pG5
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From FelLy: [2,7]
inclusive means that it includes the ...
https://answers.yahoo.com/question/index?qid=20080527170025AAJ9pG5
https://answers.yahoo.com/question/index?qid=20080527170025AAJ9pG5
Tue, 27 May 2008 17:09:52 +0000
[2,7]
inclusive means that it includes the numbers at the end of the range also. when you use the brackets [ ], that means those numbers are included.
when you use the parenthesis ( ), the numbers are not.
So: [2,7] includes the #s: 2, 3, 4, 5, 6, 7
(2,7) includes the #s: 3, 4, 5, 6
(2,7] would include the #s: 3, 4, 5, 6, 7
MORE:
you can use a U to signify gaps between the numbers.
Say you want to have include #s from 39, inclusive and 1320, inclusive, you can write that as [3,9] U [13,20].
(on a number line you would use closed and open circles.)

From Jenova: Yay! Something I can answer with 100% confiden...
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https://answers.yahoo.com/question/index?qid=20080527170025AAJ9pG5
Tue, 27 May 2008 17:06:26 +0000
Yay! Something I can answer with 100% confidence.
[ ] mean they include the numbers inside the brackets. For example, [1,10] means: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
( ) means not including the numbers within the brackets. For example: (1, 10) means: 2, 3, 4, 5, 6, 7, 8, 9
So for your questions:
2 through 7 inclusive means: [2,7] the numbers 2 and 7 are part of the set