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Mathematics 21 Online
OpenStudy (anonymous):

i want to ask about boundary points, opened and closed surfaces that in calculus 3

OpenStudy (anonymous):

1. A region in is called closed if it includes its boundary. A region is called open if it doesn’t include any of its boundary points. 2. A region in is called bounded if it can be completely contained in a disk. In other words, a region will be bounded if it is finite.

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