Perform the set operation — task. Mathematics State Board, Class 9.

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Answer variants:

$\{b, d, k, m, r, t\}$

$\{m, r\}$

$\{i\}$

$\{b, d, i, k, t\}$

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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