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Yes. Union is an operation in which all the members of any two sets are placed in a common set. The union operation can be applied to the null set and any set but since it has no members, it does not change the set the union is taken with.

It is rather like adding 0 to a number.

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โˆ™ 2013-03-08 02:55:01
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Q: Can a null set be in union with a set of numbers in math?
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