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Answer variants:
If \(U\) \(=\) \(\{b\), \(d\), \(i\), \(k\), \(m\), \(r\), \(t\}\), \(A\) \(=\) \(\{b\), \(i\), \(t\}\) and \(B\) \(=\) \(\{d\), \(i\), \(k\}\) then find the following:
(i) \(A\) \(\cup\) \(B\) \(=\)
(ii) \((A\) \(\cup\) \(B)^{\prime}\) \(=\)
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