Question
Write the following sets in set-builder$ (Rule Method) $form : $B_6 = {....., -6, -3, 0, 3, 6 ......}$
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Answer
$B_6 = \{....., -6, -3, 0, 3, 6, ......\}$
$= \{x : x = 3n, n \in Z\}$
$= \{x : x = 3n, n \in Z\}$
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