interval notation
- Thread starter jeca86
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- Feb 4, 2004
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They should have covered this concept back when you were in algebra....
The domain is all allowable x-values. So check for any division-by-zero problems and any negative-inside-a-square-root problems. The domain will be everything else.
Eliz.
The domain is all allowable x-values. So check for any division-by-zero problems and any negative-inside-a-square-root problems. The domain will be everything else.
Eliz.
Notation:
Open interval (the end points are excluded)
(1,5) or 1 < x < 5
Closed interval (the end points are included)
[1,5] or 1 <= x <= 5
Read "<=" as "less than or equal to".
Or a mixture
[0,+infinity) or 0 <= x < +infinity
The above used "x" so represented domains; the range can be represented similarly by, for example, [-1,1] or -1 <= y <= 1.
Open interval (the end points are excluded)
(1,5) or 1 < x < 5
Closed interval (the end points are included)
[1,5] or 1 <= x <= 5
Read "<=" as "less than or equal to".
Or a mixture
[0,+infinity) or 0 <= x < +infinity
The above used "x" so represented domains; the range can be represented similarly by, for example, [-1,1] or -1 <= y <= 1.