Question

what do you mean by null set?​

Answer 1

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In mathematical analysis, a null set is a set that can be covered by a countable union of intervals of arbitrarily small total length. The notion of null set in set theory anticipates the development of Lebesgue measure since a null set necessarily has measure zero.

Answer 2

A set having no elements in it is know as a null set or an empty set.

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