I know that [0,5] is a closed interval and (0,5) is an open interval that excludes 0 and 5.
Do [0,infinity) and (0,infinity] make any difference?
2007-10-15 05:49:09 · 3 answers · asked by cidyah 7 in Science & Mathematics ➔ Mathematics
I made a mistake. The question was about infinity only. I should have said (0, infinity) and (0, infinity].
2007-10-15 06:46:42 · update #1
[0,infinity) and (0,infinity], as well as [0,infinity] and (0,infinity), do make a difference - DEPENDING on the branch of mathematics and the specific problem.
Sometimes "infinity" is an acceptable solution.
2007-10-15 05:57:23 · answer #1 · answered by language is a virus 6 · 0⤊ 0⤋
Yes. [0, infinity) includes 0. (0, infinty] does not include 0.
Infinity is an abstract concept, so ...infinity) and ...infinity] are basically the same thing.
2007-10-15 05:53:13 · answer #2 · answered by Dave 6 · 2⤊ 1⤋
well u take it as a rule..never enclose infinity in closed brackets..always use open brackets for infinity...becoz infinity is not defined which means theres no value for it..which means it cant be included..which further implies it cant be put in sq. brackets..
[0,infinity) means 1 is included...
(0,infinity] is wrong..shud be (o,infinity)..which means 0 is not included..
hope it helps..
2007-10-15 06:43:37 · answer #3 · answered by A I 1 · 0⤊ 0⤋