Determine the union pair of given sets — task. Mathematics State Board, Class 9.

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\(A =\{x: x\) is a natural number and \(81 < x \leq 86\}\) and \(B =\{x: x\) is a natural number and \(86 < x < 90\}\).

A \cup B =

\{i, i, i, i, i, i, i, i\}

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8. Determine the union pair of given sets