Suppose that A_{i}=\{1,2,3,.....\}for i=1, 2, 3,....then find ? Here Z is set of integers.

Z+ Explanation: Calculation The union of a collection of sets is the set of all elements that belong to at least one of the sets. 1. Identify the sets: 2. Apply the Union operation: The notation means: Since all sets are exactly the same, their union does not add any new elements. In set theory, the union of identical sets is simply the set itself ( ). 3. Relate to the set of Integers ( ): The set represents all positive integers. In mathematical terms, this is denoted as or . Final Answer

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